SO mother

my boyfriends mother is like super crazy when it comes to him. she always says he doesn't love her when he wants to hang out with me and she always is nasty towards me. We've been dating for 6 months and she makes it impossible to feel comfortable around her . I have no idea what to do !!! He's 18 and her only kid. but some things she says just goes too far. And I want her to accept me. help 😭😭