Marriage?

Jada Pine
So my SO and I have been discussing marriage lately. Ok so here's where the argument starts: I told him I think there are thing that I shouldn't do for him because we aren't married, I just feel as if I shouldn't be acting as his wife since I'm not one. He on the other hand feels that I suppose to act like his wife already then he'd have no problem. How do you guys feel? Any point to support either??