Down,
I know exactly how you are feeling, I'm going through the exact same thing at this very moment. I've been separated for 5 weeks now. I have one suggestion you might be willing to try. Get Michelle Wiener Davis' Divorce remedy book there is a great section called the "last chance technique". It has steps on what to do when your spouse is hellbent on divorce and your'e not. I have been using these techs. for around 3 weeks and can tell you that my "wife" is softening some! It's a bit of a long shot, but worth a try for me. Good luck to you.
Moochalee