Everyone hates me in school :( I'm a black boy?

I was popular just a couple of weeks ago I was nice to people unless they were horrible to me first now all of sudden everyone hates me jelous ppl aka haters have started trying to pick on me and pl. Who are jelous try and make me look bad a boy kicked my chair all lesson and I skilled until I started getting a lil pissed and called him a idiot I used to be funny but my self esteem has rocketed down and now my. Friends find me weird and talk behind my back excluding me from the core group what can I do? Im also A black boy I don't act like a fool like the others only for a joke someTimes and I'm not ugly so some White girls like me boys get jelous then the girl's start hating me to they only like when black ppl act stupid but I refuse to HELP ME I am loosing all my friends I also wanna be a sing err and talk to pp, like doggy Simmons on Facebook but I live in uk does this have anything to do with it help!