Ok, tyvm you cleared up some points that weren't so obvious to figure out with the details provided.
So at this point, what exactly do you want? Do you still want to save the marriage? You understand your old marriage IS dead, but that doesn't mean you cant have a new marriage with him maybe?
A lot of what he does and says is pretty typical script. He wasn't getting his needs met, im not sure how you addressed things at the time. But here you are 1.5 years later posting.
I see the fact that the divorce still hasn't happened is a positive. Or is it more the idea that neither of you really care when it gets done, you've both moved on?
This male coworker is more of a recent development then? Not something from the beginning? He's having a rough time dealing with you and someone else, also a positive.
I hope with us chatting is will keep this bumped towards top and you'll get some advice from the vets. Cause i'll be honest, I see some things to build on, but I cant give you the advice on how to proceed. He's still tracks what you do.
And of course theres the chance im totally wrong. So lets give it some time and see your responses.