Listen for this, I would absolutely amor this if this happened to me! I know, imma girl :D!
1. Call her cute and lovable, not sexy! Girls don't want to be called sexy, it makes them think that boys are only thinking about your body, and Girls hate that!
2. Get her phone number, and text her a lot. Nobody's ever done this with me! But I would feel super special if a boy did that
3. Talk to them a lot. A boy in a class, talked to me a lot last año and science and made me laugh. Do that!
4. Be nice, and don't be mean. If your mean to her, o tu just don't talk to her. I encourage tu to stop being a jerk and talk with her.
5. Try to impress us. Boys that now their stuff get girls attention, and girls if tu are lectura this, in environmental camp o did something very impressive and many boys were giving me high-fives
6. Look your best. If your all ragged and just don't appeal then no girls ever going to want you. Comb your hair in the morning, brush your teeth, take a shower, use deodorant! Just look nice like a regular boy.
7. Be smart. Don't act stupid in math class, o pretend tu don't now something. That just embarrass girls for having a crush on you!
8. If tu can chose partners in class. Try chosing her. That will ,ake her feel awesome, that someone cares for her.
9. Be yourself. Never act up, o do anything y don't do. Girls look into your personality, so don't be a phony baloney!
10. If she struggles help her. If she's perhaps doing something wrong in math. Give her a hand, be a gentleman and grow up!!

I hope this helped!! :D