More and more I believe in the script as you describe it. I had a WAH, no affair (just high hopes for a better version of a companion) - and like you said, the dog was the first thing he said he missed! I did all of the work and he came back too soon riding my efforts. I got burned badly for it. I wish this on no one.
When someone wants to be with you, they'll find a way. When they don't, well...they'll find a way for that too.
And I think when they're confused and mixed up, it's best to back off, DR for a best chance, and let the truth surface one way or the other - it will eventually.
Mid 30's Psych-abusive M with violent tantrums from XH D 9/15; NC forever on