Deb, so sorry to hear about your loss. I can sympathize with you loosing a parent.
I to was in your same situation in regards to your M just this week. I have a special relationship with another now and I think it was partly the reason my WAW proposed reconciliation a month or so ago. This after over a year of nothing more than talk of kids and finances. I thought she made clear many times over she was done with me, this was a shock to say the least. Took me by total surprise.
It came to a conclusion this past week. It didn't work out and it was I who wouldn't accept her conditions. She has not emotionally or mentally progressed at all since the bomb. She did the same things as your H with advance, retreat, advance, retreat, etc. I couldn't figure her intentions out at all, It drove me crazy. I had to tell her I was not interested right now and made it seem as though it was my own personal issues I was dealing with as opposed to me not really wanting her back. My wish is for your happiness no matter what happens with your M.
"It is curious that physical courage should be so common in the world and moral courage so rare." -Mark Twain