Boyfriends mother

Ok do y’all care if your boyfriend’s family like you or not ?! I try not to care BUT I do a lot ! I know they like me but they don’t try to get to know me at all!! HIS mom has a STRONG relationship with a girl he used to have sex with and hang out with for only a few months (THEY DIDNT DATE AT ALL) she calls her Ma and his mom offers to cook for her and everything (I’m friends with his mom on Facebook) ... it really upsets me because I know I’m MORE than good to her son and he’s happy but she doesn’t try to get to know me . What do I do ?! Stop caring ?