Interracial relationships?

ok, so me and this ex-bf broke up about 3 weeks ago and i can't get over it and he knows that. we broke up bc we were always fussing about my mom bc she is raciest and doesn't aprove of him bc he is a mexican and i am white. we were dating behinde her back but we got it worked out to where we could still see each other. well, i flipped the other day and told him i was over him and he told one of my friends he was going to get back together with me later that day but since i said that nevermind. i text him and told him i was sorry and he said "k". he won't talk to me. how do i get him back? and how can i get my mom to accept him?