The fact is, I'm sure, your H has been drawn away by the dream of a life with OW. My W has told me plenty of times that she was leaving for herself, not for OM. However, she never mentioned leaving before OM was around. What a coincidence.
I have to agree with your C. As much as it sucks, you need to back off a little and let your H go and be stupid. There are no guarantees so you MUST continue to work on yourself.
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Me: 39/W: 37 D13-D11-S8 M/T 14/20
EA confirmed: 9/13/07 D-Bomb: 9/19/07 OM Gone since 12/18/07 W wants to fix marriage: 3/16/07