Thanks for giving so much input to help us understand the situation. So often people really give so little background that it’s really hard to contribute anything logical. OK, so your options are to 1. Just revel in the pleasure of the situation for a while and maybe set a date to revisit this when he may be ready to seriously start planning a future. 2. You could gently and reasonably say that its not a big deal to call you something when your relationship is already so much in place and practice getting your needs.met by saying firmly that he should choose a word. I think partner in crime is an OK joke if he goes on to call you partner in a respectful way You could set a goal for at what point you would not go longer without some definite plans. You do have a biological clock as does he, really. I understand that your main concern is that his intentions not remain blurry for a long time. Yes, that would be difficult. You are very flexible about many things in shapes the relationship might take, but sleeping with you and acting like he cant call you his girlfriend is a HUGE red flag.