Do you think it is possible to make a relationship work if your S/O likes to drink and smoke and have friends over and you don’t really care to do that?

My fiancé has like 2 guys come over and they’re all medical marijuana patients and they hang out in the garage and smoke and talk. He always tells me he wishes I’d come out and smoke with them but I don’t really like to. Sometimes I do when I’m in the mood and it’s cool but other times I just stay in the house. He also likes to drink on the weekend and go to his friends house, he always invites me and sometimes I have a good time but sometimes I just don’t. He thinks the only way to have fun and such is to be drinking or smoking and I think you shouldn’t have to rely on that to have a good time. Thoughts?