Boyfriend is a momma's boy with no mama🙄

My boyfriend's aunt gets on my nerves so much. My boyfriend calls her mom but she's not actually his mom. His real parents are useless drug addicts that were abusive. He wound up living with his aunt because his mom beat him and he told his aunt and she went up there and beat the shit out of his mom. She even put her head in a toilet and told her to never touch him again. Then slapped her brother (my boyfriend's dad) for just lying there drugged out and took my boyfriend with her. He was 11 and hasn't seen his parents since then. My boyfriend loves his aunt and there's nothing wrong with that but I've never felt like she was nice to me. My boyfriend says I take everything too personally and she just hates people in general. He's always going to see his aunt or she comes over a lot. I really wanted us to spend our first thanksgiving together with my family but he wants his aunt there too. My parents don't care. They say the more the merrier but I do care. She doesn't even bother trying to get to know me. I feel like she half listens whenever I talk to her and she doesn't hold conversations very well. I understand my boyfriend loves her but I mean he's 26. He can be with his auntie mommy for one thanksgiving.