Your sitch sounds very similar to mine. My W was seeing this guy for 3 years behind my back, and planned to divorce me and marry him. I mean she's invested deep with this guy. We're in MC now, and we're actually getting along pretty good except for the "I have no feelings for you, only him" stuff.
Man, that's hard to listen to!
At first it just hurt. Now it kinda makes me want to puke. The ILYBINILWY crap sounds so high-schoolish, but still those feelings for me need to be there.
This is extremely difficult...most difficult thing I've ever done in my life.
You keep using that word. I do not think it means what you think it means. -- Inigo Montoya, 'The Princess Bride'