I've got a couple of thoughts for you today based on some of what you've been posting. I think it always "seems" easy for the other person, but you also have to know that in their quiet moments they must have some doubts and think about this. Like most spouses yours is most likely watching you from a distance and seeing if your really going to change. Read through that letter from the WAW again and see that years of problems build up some pretty big and strong walls and it takes a long time for them to even peak over the wall with their eyes much less to walk out from behind it.
My second thought is you have to stop the pouncing thing. Trust me its exactly what I do, my wife cracks the front door just slightly and I try to push it open....but think about when you were a kid playing with your friends or siblings and they cracked the door and you pushed on it what happened......exactly they pushed back even harder trying to get it shut again. Thats what my wife does and most likely whats happening to you so to continue the analogy.....if you were playing this game with a friend and you didnt push on the door do you remember what happened? They opened it a little wider to look around and see where you were.
My final thought for you on this is that you have to be unavailable enough for him to want you, and also he at least needs to believe that your not gonna stand around while he dates someone else and you'll be at his beck and call. I thought about that when you said he told friends at the party that he wants his family back together, but does he want it back together now, or does he just want to know that its always gonna be available to him whenever he's done playing. I think thats the most important reason for you to be unavailable, not pounce etc....so that he won't figure out...if he hasn't already...that your gonna stand around waiting for him while he plays the field for a bit.