Honey, Sorry you find yourself here, you've gotten some good advice.
I will just add a word of caution: if you do the dinner thing, do not go into thinking you know what he wants.
Go into it prepared for anything and everything.
I say that because it could just as easily be his effort to try to get out in front of this divorce and see if you all can work out an amicable settlement.
So he could still be forging ahead with his MLC but just doing it in a different way.
You really just need to not have your hopes up. But at the same time, don't go loaded for bear either.
Just go, detached from what may come of it. Like someone else said, like dinner with a "friend."
I know, hard has hell, very unnatural, particularly under the circumstances. But one thing you will learn over time is how to act "as if".
One thing that may make that easier is not to go to his place, but to meet at a neutral location. You go with what you are comfortable with.
Best of luck. Stay with these people on this board. They will hold your hand every step of the way.