Why Did He Do This

Hey girls i just had my 15 on dec. 4th and i had fun but my ""man of honor"" only danced with me one time the whole night and hte rest of the time he was with some other girl at my party and that made me mad . He even mad me cry but there was this boy there and i like him alot and he stude in my 15 so i danced with him the whole night and ther ws 1 one my friends that i invited and she likes the boy i like and know she doesnt like my bc i was with him the whole night . But the most in portant thing here is should i forgive my man of honor ?????and another thing when i saw my man of honor at school the stuck up the finger at me but y does he not like me??