MOst infidelity experts maintain that infidelity happens in the healthiest of marriages too.
His claim is more or less an ignorant dismissal of the facts - good strong marriages still experience infidelity - he's deluded if he thinks "If i loved you then I would never have cheated" - its classic infidelity script to justify his affair.
If the affair IS endING... he needs to go through several weeks of withdrawal before he's in any way prepared to receive anything constructive.
He was ready to walk because he had an escape... I strongly suspect that his readiness to walk is paraellel with the level of commitment OW was offering him. The more she promised to leave her H, the more committed he was to leaving.
If she tells him to "hit the road" I suspect that his readiness to walk will hit the floor pretty quickly.. but he would never admit that.. he is deluded and has to save face. He needs to learn some humility in order for him to have a healthy relationship.
