I don't know, it's really hard to communicate about this stuff. It sounds like he doesn't want to say you're the one unless he's ready to marry you the next day and maybe there's some discomfort for him in even talking about those possibilities where you might prefer to talk about this stuff to work it out/make sure you are both on the same track?

What would change from the way it is now if he said directly that he wasn't sure yet if you were the one? Would you want to hear that or would you rather he skirted around it?