Well I'm in sixth grade and I'm twelve and there's this guy I really like and I sit next to in class and I want him to like me too but I don't know if I'm pretty enough and I'm not bone skinny likemost girls

Pretty enough? Where did that come from? Who says a girl has to be "pretty enough"?

What guys want is someone who will be interested in what they have to say and who will boost their egos (because they are scared too).

Image really doesn't matter. All girls are beautiful no matter what age, shape or size. If you really do like him, then try to hang out with him and talk to him more. The closer you get, the more likely he is to ask you out. Also, if he really gets to know the person you are then image won't matter. True beauty lies inside. Xoxoxo

Personally, I find personality more attractive and looks are just a bonus! And if this guy doesn't like you because of your looks then he doesn't deserve you, but if you like this guy, go and talk to him, your only young, go for it!