Why do I get picked on?

These people sound jealous of how good looking you are LOL! Sounds like it really hurts though, if I were you I probably would have burst into tears already :). Since you were just sitting there, maybe you could say something like "what are you talking about?" or "I didn't do anything to you" or something like that. Either that or just ignore them, they're jerks and bullies (us girls have them too) and they're just trying to make you feel bad. So basically, don't show that they're hurting you and eventually they should go away. They're just people that can only get amusement out of other people's suffering.