From my experience and perspective:
1st Stage - Anyone catch the number of that freight train that hit me?
2nd Stage - It's all my fault, what's wrong with me, I'm not good enough. I'm too fat, too frumpy, too Mumsy, too ( fill in the blank).
3rd Stage - Get a grip, some of what he said has truth, other stuff is pure unadulterated BS. He doesn't want the marriage. WTH does that mean? He's an asshat, coward, ( fill in the blank). No, I DON'T WANT TO BE YOUR FRIEND!
4th Stage - OK, pull up the big girl panties and get on with it. Make the best life you can for yourself and the kids. Remember, be kind to YOU! You will make choices only for you and your kids.
5th Stage -WTH did I need him for anyway? I'm doing just fine, sometimes lonely, often sad, and solo sex isn't exactly earth shaking, but it'll do...for now. Gee whiz, it's actually kind of nice to have a big bed to myself, be accountable to only me, to make decisions in my own best interest.
6th Stage -Wow, other people are noticing I have special qualities to offer. I'm a good person, I like myself! I'm having fun and enjoying my life most of the time.
7th Stage - Bye bye, husband. Hope you make a great life for yourself, hope you sort it out before you die.
I forgive you for all your past transgressions. I won't forget, but I choose to forgive. The person you are you carry with you. In a way I pity you husband. I can't change you. I can't make you feel. I can't make your choices for you.
Good luck, kisses, my best wishes and general loving feeling go with you. See ya around!