Going out on a limb here but having had my H come back to me once 7 years ago, I want to remind you that he chose you because you are the better woman and hopefully it is as much for him as it is for you.
Take it slow but really you'll need to have gratitude while still honoring how valuable you are. He isn't doing you a favor.
So, talk is cheap. Make the marriage work. ML and tell him in your own genuine way what it means to you to have him completely.
Never take the M for granted but also, never believe that you are the lucky one out of the two of you. I hope I'm making sense. I fed into my H's belief that I was lucky to have him and I think that diminished the value of what he was getting out of it too (always looming though subtly was the possibility that he could "choose" someone else again). Make sense?