Guys Only: Why can't I get a boyfriend?

I am 14 which is still pretty young but I would really like one. Not in the desprate way, but I think it would be really nice. I can't understand why I can't get a guy. I am pretty cute I guess. I am a little bit thick and curvy but all my guy friends say that they kinda like that in girls, I am also kind of musclar. I am simple, not stupid simple, but low-matneince, care-free, and kind of reserved. I am southern, not with accent, most of the time though, just what I like and my way of life, and looks. I am starting to think that it is because I have known most of the guys at my school since I was little, cause when you know someone your whole life you tend to just think of them as friends. But it might be my standards, I just want a nice good ol' boy, that is christan, and sweet. But all the good guys at my school seem to be taken. So what yall think it is? Also got any advice about what you like in a girl, or how you like potential girlfriends to act around you?