From your original post:
"...his tactic was to act like he suddenly didn't care about me anymore. And when I expressed my feelings about that, told him I was hurt, he intimated that I was being unreasonable."
This is who he is, and how he's going to treat you. This is about what sort of behavior you're willing to accept from a life partner. In this life, we will forgive any number of people for the wrongs they've done, but that is totally and entirely separate issue from continuing to engage and allowing them to hurt us again. How involved we stay is a choice. Enabling is a choice. Accepting and condoning behavior is a choice.