Hey Fit,
I am positive your H didn't come up with all the story of the cheating to make it "easier" for you to accept the divorce. It looks pretty clear from this side of the fence.
I know that being betrayed hurts like hell - but at least this thing happened fairly early in the marriage and I understand you guys have no kids. Don't try to understand his behavior, it is a waste of time -
Marriage is a "contract" you make in front of God - but the way I see it you were actually the ONLY ONE signing it..... so it cannot be a valid contract.
From a guy perceptive, if I were you, I would run away from a person that you are never be able to trust.