Guy question,is he putting on an act?

theres this guy who I kinda like, hes totally gorgeous,hes at my school and we are both share one of our classes together but I never talked to him, he always acted really dumb...well he was at my mates place when we went over there one time and he...

turned out to be absolutely hilarious and nice to me...but I just found out that he'd been mean to one of my friends not too long ago, and that really bugs me! I dunno if hes just putting an act on at school or what...! Should I give up on him?

If he was mean to one of your friends, give him up girl. No man is worth letting another true friend get hurt