Irritated ASF

Honestly this is a bit of a rant but Damn. Me and my fiance have been engaged for 4 months and together for about two years and my mom is pretty religious, so she doesn't approve of me marrying a woman. I'm super uncomfortable with this specifically because her motto is "I still love you but don't agree with your choice" and has repetitively told me I'm going to hell. Mind you, I have not lived under her roof or anyone else's for four years (she kicked me out). She's extremely rude to my fiance during family events as well as to me and I really can't think of what else to do. Any advice?