While you identify yourself as a WAW, some of what you have written sounds like the dynamic is similar on both sides.
Of course, we are only hearing your side and there is no way to know if your H is testing (or even taunting) you or actually means what he is saying. We do have a saying around here, "believe none of what they say and only 50% of what they do" and I suspect this might apply to your sitch, for you. ie. It will be his actions, not his words, that are likely to show you his true intentions.
Did you agree to be in an open M when the two of you split? You say you were happy for him when he started dating. Why was he dating while the two of you are still M?
Please pick up the Divorce Remedy book written by Michelle Weiner-Davis (which is a follow up and kind of a second revision) of the original Divorce Busting book. It is possible that you may want to look at the Last Resort Technique and also follow the 37 rules that is passed around here which began as a "note to self" by a member named Sandi2.
Sandi2 was a WAW and I suspect she may come around to your thread soon. Whether she finds this thread or not, other members will be able and willing to support you through this.
Remember, you know what it was like to be the WAW... if your H may have become a WAH (which is possible and might have been triggered by his trauma of you detaching from him), then you have some insight into what he might be going through and also you are now getting some insight as to what the LBS goes through... use your experiences to remain empathetic with your H...
And we also say around here... stick around, post often, listen to what others post to you as it may help, do the work... fix the things that you feel you may have done that were your responsibility to the break down of the M and become an even better person in the ways you feel were your good attributes... by doing so, you become an even better person and one which hopefully... only a fool would leave...
