Katy, you're only 11, you're body is going through a lot right now. (sorry, you probably have to hear that a million times a day.) I wouldn't worry about dieting or losing weight, but if it's something that is really and truly bothering you, just start eating healthier or doing more activities because you're body needs a lot of nutrients and right now is the prime time that you should be giving it these nutrients. ~chaz.