GG, Cadet is right...there is nothing that will change or shorten their course once they've entered into MLC. One thing...I thought about is that if he's sulking and being passive-aggressive when you distance yourself, stay the course. When he sees that you aren't giving in and returning to where he thinks you should be sitting, he may very well begin to pursue you at some point, in some fashion.
You are the one that can break the cycle by not giving in. Again, you can also experiment a bit, but if you don't see a reaction, then I would continue as you have been.
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.