My mother in law

My bf and i have been going out for 2 years and while our relationship is good its his mom that doesnt want us together because im black. It hurts him and it hurts me as while but idk what to do about it. She doesnt talk to me, she doesnt even wanna get to know me and to why her son fell in love with me she only knows that she doesnt want her son with a black girl.