I developed curves at a young age and people make fun of me for it...?

That what almost every guy likes. You say the guys stare . Thats because their attracted to you! These girls see that and get irritated because you look so pretty. Next time just tell them "I can't control how my body is shaped, don't insult me over it" or "Why are you picking on me? I'm not doing it to you, I don't find you ugly , I can't control how I grow" etc...something like that . Itll make them feel bad. Just keep saying it.