You are the one in the situation, and I don’t know him at all. My honest suggestion is that the two of you sit down and talk. Don’t make it a confontation, it needs to be a long discussion where you both listen to what the other is actually saying. Maybe he feels there is no need to be married since you’re already long term, or maybe he senses he’s some kind of rebound, or maybe its fear, or any one of a number of things. Right now, you’re guessing. The same with him. Is he saying what he thinks you want to hear? Is he afraid of hurting you if he says marriage isn’t what he wants right now? Was he saying all those things because it was easy to say when you weren’t divorced yet and no that its final it’s become too “real”? You will only find these things out from communicating. Believe me, I can tell you from experience that lack of communication causes more break ups in a relationship than any other thing.

Good luck.