Personal situation aside for the moment, your website project sounds exhilarating and fufilling. It is good to hear all your enthusiasm.
Now on the personal side, it sounds like H is still up to his P/A tricks. Making you feel uncertain and angry by his lack of communication or confusion about when and with whom he is communicating, ie: you or D??.
And maybe some of that anger is getting a little misdireted towards OW. Now not to say that she doesn't deserve it!!!! But in reality, try to remember this is not about her. It's about him.
He is the one who you need to look to for responsibility here. It is his decision to keep the "relationship", however stupid it may be, going.
He obviously, doesn't think about whether you are worried or not when you don't hear from him, or he uses it as a way to get you to feel uncertain( and It's working now isn't it!!)..... But it would appear your concerns are not on his radar scope right now....The only thing he thinks about seems to be HIS agenda. SOOOOOOOO, try not to worry about him too much. He will just have to fend for himself!
And we both know thinking about what he may or may not be doing with OW is simply not good for you!! Try some thought Stopping and put your mind to rest...
Big Hugs!!!!!!
Trish
ps. I bet it's actually bothering him that you haven't been pursuing and getting all worried!! He has to have alittle conscience on his shoulder whispering, " Why hasn't she been more curious about what I'm up to?!"
going. 
