Man, in the photos I've seen of you, you don't look remotely fat... but if you want to lose weight, highly specialised diets are probably a bad idea at your age. I'd suggest something more general: eat lots of complex carbohydrates to fill you up, and you'll find that you won't feel like snacking on junk food anymore. And if you're not already in a sport, get into one. But I wouldn't be too worried about your weight, seriously - I don't think you're going to have a cardiac arrest anytime soon...