Kerry is right to say that you need to keep pushing him for the D. The others are also correct to see that not only is stbx in denial, but you are beating a dead horse in trying to get him to own up to what he's done. He can't and he won't.
In fact, there will be no movement from him until he is FORCED to move. So, keep telling him you want the divorce and you want it started now. Keep telling him it is too late and you are moving forward. Keep telling him you lost your ability to love him a long time ago and now it is dead for good. He needs to see the seriousness of your wants, so keep beating it into his head.
As was also mentioned, maybe try to go as dark as possible and only talk w/him on matters about the kids or about his filing the divorce. Everything else - his feelings, his actions, his apologies, etc. - are off the table for now.
