Roxi, You may want to consider not "touching base" on the divorce right now. To me, it's putting pressure on him to make a decision and quite frankly, he's not ready to make one. Notice he said it would be put on the back burner. He's quite happy w/the way things are right now and the more you push, the more he's going to drag his feet in deciding what to do.
If you are going to have conversations w/your h, keep them to safe topics and/or topic of interest. Stay away from relationship talks for now. If you are beginning to feel like friends, then treat him as a friend and not pursue or put pressure on him.
Try to keep the focus on you and allow him the time to figure things out. You can't rush the process.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.