Well, since you're really very young, I imagine it'll change as the years go by. Honestly, though? It's who you are, and I say be proud of that. I think it's OK to be hurt by that comment of theirs, ... especially if they know you don't like it; it's only gonna make you focus on it more, even if you pretend not to care. Smiling is a wonderful thing; never feel bad about smiling.