I hear pain and frustration in your voice (writing) again. Sorry to see that.
As for the situation, Astime has it right - the jealousy thing won't be a significant factor in the big picture. It might be the jolt needed to get her thinking but in the end, it's nopt what will bring W back.
As for the dating thing....well....I hear so many on the baords making judegements as to the actions or motives of others. If we all have it so right, then why are we on the boards? Point is, do what's right for YOU. Isn't that a key principal in Michelle's teachings anyway?
I for one, went on my way, started dating, building a new life, and in spite of the pain and anxiety of divorce am actually quite happy with my life. My relationship with my W, albeit tenuous because of divorce negotiations, in my opinion, is healthier than ever seeing as I am doing what's right for ME. I think many of us on these boards, are here because we gave to much, enabled, some or simply rolled over, rather than standing up for our own needs.
I know you want your W back, Jack! Hell, what I'd do to roll back the hands of time but.....for now, this IS your reality so, rather than spending your life focused on teh future and what it MIGHT being, try to focus on NOW. What can you do to make the most of your life, given that your W is not with you right now? If that means dating, than I say, by all means, enjoy!