What should I do?

I’m Dominican and my bf is Nigerian and I’ve always been mommy’s little girl. Straight A student an athlete stayed away from drugs never given a reason for my mom to distrust me. I am 16 and I have spent every waking moment making my mom happy even if it meant I didn’t get to be. The problem is that my mom hates the idea that my bf is black even if she doesn’t want to admit it. I was raised with the idea that I have should marry a white man. Ever since she find us walking home holding hands things have been very different and difficult at home. She said I ruined the family tree. Was the worst day of my life and my bf couldn’t have been more helpful and caring btw he’s name is marvellous I find it pretty ironic.😂

What should I do about my mom the last thing I want to do is end it with him?