What should I do about this

I am dating this guy and he is younger then me and is black and I don’t know how to tell my mom about it me and him really like each other and my mom don’t want me dating him cause he is black and I don’t know how to tell her that me and him are dating I’m 19 and think I can make my own disition but my mom don’t want me dating a black if I tell her she will get mad and never talk to me again and I don’t want that to happen what should I do I really like this and he likes me and I don’t want to mess this up between me and him what should I do?