I think it may be time for your husband to "lose you." I think it may be the only way he'll ever learn to appreciate what he had. And I think mentally you are closer to being ready for it. I think if he "came back" (mentally to the marriage) now without truly appreciating you, neither of you would be happy. He'd continue to wonder about the "grass on the other side" and you'd always feel like second place.

I could be wrong, but that might be something to consider....

There is no arriving, ever. It is all a continual becoming.