Christmas drama

This is my boyfriend and I’s first Christmas moved in together and he had to work tomorrow. I want to spend my Christmas eve with him at our apartment, then go to his parents for the night. We’d go to dinner at my grandparents Christmas Day, then go home since my bf has to work day after Christmas. My mom STILL thinks him and I should part ways since “his family will want alone time with him” which is code for “I want you to come without him”. She says it’s “family time”. My boyfriend and his family ARE my family. I don’t want to spend the night at my parents, purely because I don’t know if they’re going to get drunk or not. They’re alcoholics. I don’t want that. I also don’t want to celebrate another Christmas, yet again, without him. We went 4 years without being together for it because my mom refused to let me go to him, or him come to me. She thinks I don’t care enough about my family, but that’s obviously NOT the case 😒 Jesus Christ she’s already ruining it. Can’t have it both ways, and obviously it’s easier if we do it the way my bf and I planned. Everyone wins then.