Hmmmm if he were really wanting to rebuild your trust in him & truly valued the marriage he wouldn't be using your unforgiveness as an excuse to go out & do exactly what he did before that caused your lack of trust in the first place. He would be using this time to build, not tear down what takes a very long time to rebuild in the first place.

That's just him rationalizing his bad behavior again.

Sorry, I wouldn't buy it for a moment.