Help!

My mom is constantly threatening me and my relationship bc my boyfriend is black. I tell her I love him and I’m happy and she instantly goes crazy and says no you don’t. She is driving me insane and I cannot take it. I do not live with her and I’m sick of it. She calls and texts and it’s harassing me. Even if I block her number she finds ways to talk to him. I do not want her in my life ruining my perfectly good relationship all bc he’s black! Its-old and I’m tired of it. What do I do about her?