Alice, the best thing you can do for yourself is gather around you a support group. The first people to talk to would be your parents because I'm sure they love you. Perhaps the reason why you have these feelings about how you look etc., is maybe from something you learned when you were young. Shoot it could even be something you heard your parents say about girls/women and their weight or appearance, and not even mean you. But it is very common for young girls to have image problems. Stopping something by yourself can be real tough because without direction you tend to go in circles.