But it's not a perfectly good relationship if they both don't see it the same way in the long run. As you get older, the choices seem to get slimmer so wasting 5-10 years on a relationship that isn't going to be the way one partner wants, is not a good relationship. As someone said before, believe what he says and don't hope he'll change. My viewpoint would be completely different in my 20/30s but now that I'm in my 50's, you need to find someone who has the same goals as you.
I'm someone who wants to get married again, have someone to worry about things with me, know someone is going to be there on holidays (without me asking), someone to talk about a show I'm watching at 10pm, etc. I can call my best friend on the phone or ask her to go to dinner and then go home by myself. I don't want another friend, I want a partner.
10 years ago I had friends that said, he'll never change. I said, well maybe he will. 10 years later and 10 years older, I'm now having to make the decision I should have made 10 years ago. Mine likes it how it is, his house, my house etc. He does help me, he figures things out with me (needing a new roof type of things) but it's not the same as "our" responsibility. I get a lot of "this is what I'd do if I were you". To me, there is a huge difference than someone saying "what do you think WE should do".
However, if you aren't sure or don't want someone living with you later, than keep the status quo. I think because you are asking about it, you probably do want it and to me, it's a huge deal breaker.