Just do it anyway, that’s what I did 3 years ago. Now we’re engaged and I couldn’t be happier. My mom always told me living with a man was a bad idea but honestly she was just projecting. And despite my man proving himself to be a KING, nothing we ever said or did could get her to change her mind. You are the only person who knows everything about your relationship and you should do what you think is best for YOU and makes YOU happy. Also your mom will eventually have to accept and move on.