I don't get it.

I try so hard. I diet, I starve myself, I work so hard and its never enough. Everyone else gets the life I want with no problem, everyone else gets to be perfect but me. They dont even have to work for it. I try to be good, I swear I do. I just feel horrible, like I'm drowning but the only thing keeping me down in the water is myself. If I lose the weight I know I'll be happier so why can't I? Why is my body taunting me? When will it end? I need to stop. Please let me stop.