I've reached my boiling point..now what?

School socially has never been anything spectacular or anything and on top of that I go to a dominantly white school. They have no respect for me and when I'm myself I get judged for it. I'm one of those people that don't listen to other peoples opinions of me because I'm a total stand out individual and I have always been that way. Today was shitty and after being insulted and called a ***** all day long ( I'm REALLY pms-y today and my anger was at an ultimate high) I do kinda regret the way I was treating some people but my head was some where else today. Anyway, when I thought the day couldn't get possibly worse I got on the bus and was just blocking out the world just wanting to get home peacefully. That didn't happen. After a kid sitting infront of me was using racial slurs to my face and when I asked him to say it again HE DID. I was so fed up and I blacked out and the next thing that happened my knuckles were hurting and I was going off cussing at the bus driver and the kid who triggered me to punch him in the face. I have no regret for that because the kid had it coming..he should have kept his mouth shut. Being called a N*#GA has happened times before this past year and I have never hit anyone because of it because I was always told to never throw the first punch but today I was on edge. The worst part of it is how after I punched the kid his friends said stuff like "he was just joking" or "calm down".. I never responded to anything they said to me because they wouldn't understand, they aren't black. Next year I'll be in high school and I just can't wait to leave and move on because they **** I go through now is bull. Tomorrow I'm sure I'll get called down to the office or something so I'll just wait it out. But then again my bus driver doesn't report anything that happens on the bus and after I punched the kid in his face him and his friends shut up so I guess something worked. Any thoughts? Sorry for the long story:/