My friend had the same problem growing up, she looked like a walking skeleton. Eventually she got curves, and now she has the most knock out body. She's 5'7'' and has a 26 inch waist, eatting whatever she feels like. So my advise to you is no worries really, it'll all work out in the end and eventually all of these people who make fun of you are gonna be jealous when their all fat and you're still thin.