Want to lose weight FAST?!?

I'm 13, but have the height&looks of a 15/16 year old, I weigh 140lbs, and am 163cm tall, I walk to school, usually takes 20minutes, then I walk home, takes 20 minutes, and I HATES MY BODY, every day I make myself angry and upset because I'm fat. everyone tells me I'm not, but I know I am. I feel horrible about myself. and people ALWAYS compliment me, every day, and I hate it because I think their lying, at least 4 boys a day grope or compliment my *** and say that I have a "fat&peachy ***" I know I do because I (think) I have wide hips:/. and girls&boys call me "pretty, gorgeous, beautiful" but I seriously don think I am atall, the only thing I like about myself is my eyes, because their green:L. I need a way to lose weight, I can't go to a gym, atall, I play netball for a hour and a half every friday, I need a way to lose weight fast, before I go back to cutting to stop my anger:(. please help?