it's because you really like her, and you kinda want to loose your thanggggg to her.
Guys are weird about this. Maybe everyone is in the beginning. Sex means more when you haven't had it before. But after you get beyond that part where you want to kill everyone your partner has ever slept with, you see that your partner was a person before, after and during your existence with them.
Should she have waited her whole life to sleep with you? Why? Are you going to marry her? What if you sleep with her, and then you break up, and then she meets someone new who is like, what the ****? why didn't you wait for me?
Sex is a sharing experience. She might have been too young. Having sex too young, most people regret it when older. You aren't ready for it yet, but with a lot of girls, they don't know that. Their friends have it, it's advertised to them a lot on tv (Jonas Brothers, sexy Miley Cyrus, True life of an American teenage girl, are just some examples. In my day it was the Backstreet Boys and Britney Spears.) and they think, hey this is what I'm supposed to be doing.
Really, your girlfriend is just like most girls. Innocent in mind and heart, but no longer body. Well, that's if you place sex as a physically pure thing. If she's had one single partner, maybe you could teach her what love really is. Do you love her? Could you love her? Love is a bit more complex than sex.
Sometimes I worry about being a success in a mediocre world
-Lily Tomlin