I am sort of pretty, but I don't really have a "bangin" body that guys want. I distribute my weight well, so I look slimmer than I actually am, although I fear that I will be alone forever. I am 16, in case that is a contributing factor. Will guys grow up?
Guys will grow up and someday you might even have more than you can handle. In high school I was consistently told I was just "one of the guys" and "not girlfriend material," but once I got to college and certainly past college, I've had a pretty easy time getting dates. It's all about confidence: it's not necessarily the guys (although they do mature and so do we and that makes life easier for everyone!), it's how you carry yourself. You get to a point where you learn to walk into a room and own it.
Some guys will grow up and others never will. The trick is to not waste your time chasing after the ones who haven't grown up.