I feel like my fiancé is keeping me from his family?

I’m trying to see it from all points of view but it started out slow and now he’s not wanting me around for holidays. His mom called giving us a choice wether to come to Christmas because of COVID and jumps on the fact we aren’t going but has no problem going to my moms who works in the hospital. He doesn’t ever act like he hates his family in fact he says he loves them. It’s confusing I’m marrying him but he isolates me away from them as well. I’m not sure how to feel about this because I have never been through it.