you can still eat, please dont try to starve yourself.(it doesnt work).
Eat fruits and vegetables if you want to pig out. Go ahead and throw away all the cookies, chips and ice cream....you mom wont get mad. If you drink sodas, choose diet. I used to not like diet and now thats all I will drink, regular sodas gross me out.
Get a hobby, like playing sports. Try snacking all day, if you starve yourself before meals you will end up eating more than you should.
Good luck