Not my area of expertise, but if he's been ignoring you I'd give him space and avoid pursuit.
Don't believe any of what he says and half of what he does. He doesn't know what he wants.
I'm not saying you're M is over, but there are no guarantees and if it does work it's unlikely that it will be a straight shot to happily-ever-after land. It will have set backs, false starts, etc.
I'd say really detach and let things drift further away, all while making yourself the best person you can be.
For those that didn't follow your original sitch, what did you do to contribute to this separation? How have you changed since? Has your H noticed? In what areas do you feel you need to continue to grow?
Me:38 XW:38 T:11 years M:8 years Kids: S14, D11, D7 BD/Move out day: 6/17/14, D final Dec 15