Life has a lot of twists and turns and surprises also. I think it will be wise if you try to stay at school and maybe try to create a circle of likeminded people to share your thoughts and feelings. Not feeling alone is the most important. I fantasize too what will be like to be famous and i can relate in what you wrote about living in the reality of me as a famous artist. Damn imagination. But fame is a construct, sometimes a lie and has nothing to with bringing value to the society. This is how the world changes, by taking a role and try to do the best with it. You have the role of the artist, you will aways have this role but you will have others also. You are talented also, none will ever take it way from you. Leave the others talk about money and how they will use art just as a means to an end, they are cheap people. But i think there must be some among them who feel the same way with you. And with them you could share your thoughts and make this school experience more bearable.

I hope i made you feel a litle better, i am stuck in this comment a lot of time, trying to find what to say:)