what should I do?

I have been involved with only one guy over half a year now. We were in a relationship for a while then my mom found out he smokes weed. I personally don't care but my mom will not accept him if he smokes. We have tried to stay away from each other but we always end up together. We were talking last weekend and he said that he will only call us "boyfriend and girlfriend" when I make a decision about my mom. I have already talked to her and she won't accept us, the only way for us to be together would be if I moved out of the house. Any options? 
Thank you!!