There is not much I can say, except that this will continue to be painful. In all likelihood he will say a great deal of painful things to you before this episode is complete.
My advice is to try not to let it get to you. Watch his actions, listen to what he's saying, but realize that he may be merely lashing out. In some ways, the WAS thinks they can justify their actions by making you mad enough to yell back at them, or even for you to initiate a divorce. Then they can stand back and tell themselves and everyone else..."See, she didn't want me anyway." or "That's why I don't like being around her."
That's where the ACT AS IF philosophy and detachment comes in. You have to try to stop letting him get to you. Continue your life like everything is fine and make it clear that he's welcome to share your life with you if he choses.
I know it's hard. I can't really say I've ever mastered it, but I'm convinced this is the secret. Even then, there is no guarantees. He still may not resolve his problems...but that's part of it. It is his problem, not yours. Look at yourself, fix or improve those things about yourself that you are unhappy with or just want to change while he is like this. And let him figure his own problems out.
I don't blame you for being discouraged. It's a very discouraging time and only you can decide if you want to put the time and effort into the R while he seems so willing to just walk away. But if you do decide to stick it out, just be prepared for him to say one thing one day, and something totally different another. He's confused and may stay that way for a long time.
