My friends are raciest?

So recently my friends have become extremely raciest. I am half Asian and almost everyday I hear the same slurs, the same jokes, etc. I used to put up with it because it was in a joking manner but now it's getting out of control. Its so bad that at my eagle scout project I was called a slur and no adults what so ever cared. I feel isolated. The other day at school I was harassed in front of an administrator yet they did nothing. Any advice on what to do? It's starting to annoy the hell out of me. I ask them to tone it down and that's failed. I've tried talking to other adults yet they don't care. Please any advice.