Well... One thing is for sure, if what they say isn't true about you, then you can tell yourself that over and over. A friend once told me someone in my class/grade (my class WAS the entire 8th grade; this was last year, by the way) called me retarded. But, if I were retarded, I wouldn't be as knowledgeable as others now, would I? So really, just say to yourself that you know you aren't like that and it'd really work ^^