at 15-good idea? im white hes black and all of our friends hate it, but we love eachother and r horny?

My BF is Black and i'm white. All of the people he hangs out with in school are black and i know that they are giving him grief and he has been beaten up on numerous occasions (once by my brother) just because he is going out with a white girl. My best friend hates black people, she does nothing but slag my bf off due to his colour.IS THERE ANYTHING I CAN DO ABOUT THESE SITUATIONS? I am scared that he is going to dump me as our friends are casuing us upset but he is the most loveliest kindest guy i have ever met and i love him so much, our relationship is still strong but outside prejudices are making it a struggle. Even though we are 15 we are thinking of having also, admittedly more him than me but if anyone finds out everyone will hate us, and i will not have my best friend's support, we are even scared to get on eachother infront of others. IS HAVING AT 15 A GOOD IDEA???, WE REALLY LOVE EACHOTHER AND THROUGH THIS HARD TIME WE WOULD LIKE TO EXPRESS IT. HELP!!