Lea, Once again I could have written your post--my H said he wants me to find someone who will make me happy, that something is missing, etc, etc.
I don't know how people's feelings can change so dramatically. If you had chemistry enough to fall in love initially, I think those feelings can be revived.
My H keeps talking about the "old version" of him, who was right for me, and the "new version," who is not. WTF is that all about?
My H, like yours, seems hellbent on S, and I believe he will not change his mind once he goes. Even if he did, his pride would keep him from admitting it.
It's very, very hard to move on when someone has been such a huge part of your life for so long.
Me/X-H: 47/48 T 19 yrs M 16 years D14 D10 ILYBINILWY: 10/07 H moved out 6/08