1Be honest.
In a relationship, honesty is por far the best policy. It may be difficult, but the truth will allow relationships to breathe. It is tough but no matter what happens, no one can ever challenge the fact that tu are truthful, which might mean that the other person also gives tu the same respect. Statistically, studies found that when a couple were más honest from the start they were más likely to become spouses o long-term partners. If tu have a relevant opinion, let them know, otherwise tu aren't giving them a chance to fix things and grow. Don't always try to make it sound like a compliment. It's fine to suggest an alternative, and attach praise to the alternative (For example, if they ask tu if tu like something they are trying on, let them know that it might work, but tu think the blue one is your favourite so far because it shows off their great ___.) But if tu do that, eventually she's going to wear the original articulo that tu didn't like, and eventually tu will both get very tired of that strategy. It's the same with other problems: telling her what tu like is fine, but tu have to tell her what tu don't like as well. Sugar-coating is fine, but deflecting isn't. Expect this kind of honesty back, and if tu both realize that expressing such opinions just comes out of caring and honesty, you'll both have a better relationship.

2Don't brush them off. People often find it exasperating when they get the feeling their partner treats them as an inferior in a relationship. Women are no exception. If tu really honestly care about that person then tu will spend the time that they rightly deserve, o at least discuss the situation. Remember, she is your girlfriend because she likes being around you. Some girls have been taught that the only way to get attention when their boyfriend ignoring them is to act más emotional and be louder until tu finally surrender and pay attention to her, even if in annoyance. If people feel they're being dado the cold treatment por people who are supposed to be important to them, they get worried. Especially when it happens without tu giving an explanation for why this disturbance has occurred. People aren't mind readers. Your mate is not likely to be able to guess that you're cranky because they wouldn't let tu do something that they felt was very trivial, whereas tu found it important. If tu know that your mood might lead tu to overreact, simply say "I'm pretty angry and I don't want to fight like that. Let's talk later" (Don't forget to follow through and actually give her your time later.)
3Communicate. When tu talk, tu want to get a 50-50 balance in the flow of conversation. Neither gender enjoys an overly quiet (she thinks: uninterested/distant) o overly talkative (she thinks: self-obsessed/impolite). Unless of course something very exciting o important has happened for one of you, in which case a bit of conversation-dominance is expected. If tu don't feel much like talking at some point, keep a flow of small preguntas going. For example, ask them what type of cine they enjoy, o about one of her favourites. If tu know it, talk about it a little bit in an honest way, what tu thought of it, and make a guess at why they might have liked it. Even if tu are wrong, your mate will usually amor the fact that tu are interested enough to try. Remember, the opposite of talking is not waiting for your turn, it's listening. Make sure you're actually listening, not just waiting for your turn to talk. Don't listen too intensely, staring and not once breaking eye contact is a bit scary, but certainly seem interested.
4Make physical contact. Girls have much thinner skin than guys, so even a light touch is appreciated. If your girl is a romantic, upon seeing her for the first time in a couple of days, say, "I missed you..." and weave your arms around her hips then give her a loving hug. Don't make it last too long! A hug in public can last anywhere from 5 seconds, to a minuto o two. If tu have been together with your girlfriend for longer, and have kissed before, feel free to also give light kissed on her lips /cheeks / forehead/neck just to mostrar that tu really appreciate her presence. o just kiss her hand (not in the bowing in front of her way though, just clasp and bring it up to your lips) Make sure to do it in private o a discrete place if you're not sure how your girlfriend feels about public displays of affection.
5Gifts. Put thought into birthday, Valentine's navidad o anniversary gifts (by the way, it's the 21st century. Your phone has a calender and alarm on it so there's no excuse to forget). Give yourself time to think of what she would like. That way tu can find it at a reasonable price and it will still say a lot. A collar for instance can be tacky if it's not thought out, but silver (which isn't really expensive) and a pendant that means something to her (her name, a snowflake if she loves to ski/skate, a musical note if she's musical, ect) can make it really sweet. And always add a little chocolate. Gifts can also be a nice surprise. Listen to them when tu are out window shopping, and if there is something they like, and it's within your price range, remember it and surprise them with it when they least expect it, for no reason at all. o pick something up on your way inicial from work o school, and tell them tu were thinking of them when tu saw it. It doesn't have to be big o expensive--a book tu know they will like, o a CD of their favourite band are nice gestures. As Sean Connery says, "The way to a woman's corazón is through an unexpected gift at an unexpected time."
6Mix things up. Go to a new restaurant, try a new nightclub o go to a new part of town. Even if tu both end up hating it, it's an experience tu can share and that's what it's all about isn't it? Creating memories together. Surprise them por doing something offbeat--think less maudlin and más personal. This includes anything from racing them to your walking destination, dancing without music, o even bringing them a tub of LEGO and encouraging their immediate use. tu two should grow to be comfortable with each other, and do things together without self-consciousness. Ideally, they should never feel stupid around tu for wanting o doing a particular thing. Step out of your comfort zone. Sometimes, in order to get things going, tu need to be the one to step out of the comfort zone.
7Compliment them sincerely. Find something particular and compliment them on it, but mean it. Don't just say, "You look nice". Say "That really makes your eyes flash", "Your hair cut really suits the shape of your face" o "That makes me want to kiss your neck" ...and then kiss their neck! The más specific tu are, the más unique and appreciative the compliment.
8Let your partner be. Just because she is your significant other, doesn't mean she is yours, implying any kind of ownership. tu can't keep this person all to yourself. tu might get jealous if they talk to someone else, but if tu trust them and are good to them, tu shouldn't have anything to worry about. If their actions do make tu feel uncomfortable, sit down and talk, again using nonviolent communication. Same goes for how they dress and look. They may not always feel like spending an hora plucking, tweezing, clipping this, applying that. Make sure they know they can relax and be themselves with you. Don't make them feel like they always have to look like a celestial being. If they're letting themselves go, so to speak, bring it up in a gentle and helpful way, like "What ever happened to your red lipstick? tu have gorgeous lips, and I amor it when tu highlight them once in a while. It looks amazing."
9Take care of yourself. Don't be needy o dependent. Nothing scares someone away faster than someone they constantly need to remind to do laundry, take a shower, o get to work on time. Be hygienic and neat, set goals, and work hard. tu can't be a good boyfriend if you're not a good person.
10Be open. Being open to one's mate will mostrar care and concern on her thoughts and feelings. Being open will also allow tu to create a más open relationship towards each other as well as creating a very good understanding in what your mate wants, feels, and needs. It will help to be open because tu mostrar that tu can be trusted. After all, amor is a good combination of trust and commitment. Openness, in line with honesty will blend in perfect harmony and make your relationship last a long time.
11Be supportive. Being supportive plays a very crucial part in keeping a relationship strong. Make her needs a priority. Make sure tu are with her with what she wants all the time. 110% supportive. Upon supporting your mate, it will usher in a new and improved sense of security.
12If she suffers the death of a pet, remember that to her it is a BIG deal. Women are programed to fall in amor with their offspring, and most women refer to their pets as their bebés and treat them as such. If she cries, do not tell her to stop. Instead, take the time and hold her, comfort her. She will probably fall asleep after she cries herself out. Do not leave (unless you're going no further than the cocina to fix a snack for her when she wakes up, something simple that doesn't need to be refrigerated, o the bathroom). When she wakes, give her a hug and suggest doing something simple together such as watching tv and keeping contact. If she talks about her pet, listen, tell her the pet had a good life because of her, and that it probably appreciated it. If tu know the pet's name, use it instead of saying "your cat". She'll be ok in a few days, although she might tear up a little when the pet is mentioned.
13If she cries for a reason tu can't be sure of, first determine if the tears are happy, sad, o frustrated. If happy, then be happy with her. If sad, find out what made her sad, and comfort her. DO NOT tell her to stop crying, doing so makes her feel like she's being a burden to tu o like tu don't care. She'll stop crying eventually, just pet her hair (which most women find comforting) and hold her gently but securely as she may go limp once tu touch her and really let loose. If she has trouble breathing, get her water. If the tears are of frustration, calm her down, ask specific preguntas about what happened, and try to fix it if tu can. If tu cannot fix it, find someone who can and wait for her to calm down before asking them over to help. If it can't be fixed, and is an inanimate object causing the problem, feel free to insult it and say it should have been made for rocket scientists o something of the like.
14Remember she talks to her friends. If tu don't know what she wants for a present, ask them, they probably know most of her dream dates, favorito! spots, favorito! brands, and what she absolutely hates. However, do not ask her friends what is wrong with her if tu two have had a fight, they will almost always choose her side and word will get back to her. Be nice to her friends, if they don't like you, they may give her consejos against being with tu (especially if tu are a complete jerk to them o refuse to let her spend time with them).
15Show affection. mostrar her that tu amor her, maybe some PDA, but don't over do it, tu don't want to make her uncomfortable. Remember to read her signs, if she's not in the mood, don't kiss her!