I'm 13 years ol. I'm 5'7 and I wiegh 100 pounds. I used to be a bulimic. I'd eat alot then throw up. I lost a couple pounds...then i gained it all back quickly. I was sick of constantly losing and gaining weight, So i decided to stop eating all together. I go a day or two without eating anything, then I'll have a cup of grapes or cereal. I'm sick of this.