STAY THE COURSE! He agreed to go, give him the chance. Don't give into his tricks. On the other hand, you can lead a horse (or jackass) to water, but you can't make him drink. But it is important that you at least lead him to the water. Don't dunk his head under the water and drown him. Just a little at a time. He may just see that he may get something out of it.
It sounds like he may be scared to admit that he still has feels for you and M. The OW may have some influence over his thinking. She is probably fighting against MC and M to keep what she has. This is just a guess.
You are right you will get some answer to questions soon. Go into MC ready to work. If you really want H back you will need to fight harder than OW. Show him that you have more to offer him that she does.
