For 3 months now i have had this on and off problem. I stop eating for like 2 weeks then i force myself to eat again, I have stopped again. I do it as i want to lose weight as i think im fat and ugly (i weigh 105 pounds and im 5ft 4). I feel in control when i do it but it has got to the point where i hate sitting down as it doesn't burn as many calories as standing. I calorie count all the time. I have told my friends but they think i am making it up for attension...i couldnt stop crying when they said that as i trusted them! I do Ballet so i exercise and when i have to eat i eat healthy food, I have 400 calories a day which seems to much for me. I have just turned 13 by the way.