Well guys do care about the body no matter what, but I'm more of a butt and legs guy myself, and there are many others that don't care very much about breast size. Just try to work the parts of your body that you can actually improve in appearance and you'll be more attractive. It's not good to obsess over it, though. Maintain a healthy weight and I'm sure guys will be attracted to you. By this I mean healthy, not skinny as hell.