Should i beat up my crushes girlfriend??..did he not ask me out cause im black?

ok theres this guy name seth who me and him were extremely close this year. we flirted alot, he would hug me daily, text me occaisionally and sometimes kiss me on the cheek. everybody thought we went out and called us the cutest interacial couple of the 10th grade (he's white/hispanic and im black). and i always wonderd why he never asked me out..cause he didnt treat any other girls like this dome of his buddies even said that he had a crush on me. then 2weeks ago i found out he went out with this chic that nobody likes TARA, and im heart broken because now he stopped texting me and when i get on facebook he'll log off or go offline when he notcies im on. or when i write "hey" on his wall he'll delete it, doesnt reply to my emails, and i walked to his house yesterday since he only lives 7min away, his little brother came at the door and said "he's sick".im confused and since i hate tara (lots of ppl do) should i beat her up? cause she's been talking alot of crap about me, how do i get over seth? and did he not ask me out cause im black??..cause it sure didnt take him long to get with TARA. and im not trying to be a stalker but im confused. no rude answers. and was he leading me on??