Nope, I'm the same. Almost 21, never dated. Heck when two of my siblings and my mom were my age, they were married and had a kid. I'm fine with it though. I don't see myself getting into a romantic relationship, at least not in the near future. :)
No, I don't think it's weird. Some people get into serious relationships when they're young teenagers and others don't start dating until much later in life and others have no interest to fecha at all. Everyone's different, tu just gotta do what tu what tu want to do so tu can find that guy who tu will be happy with for the rest of your life.
No, I'm going to be 20 in December and I've never even been kissed. There's no rule that someone has to have a boyfriend o girlfriend por a certain age.