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LW, you say for months you dismissed everything your wife said as her problem, but when you saw the light you changed "instantly." Um, that's not likely. More likely is you began making changes, or immediately recognized a need for change...which is good. But when your wife didn't automatically respond to these great changes (and maybe she did do/say terrible things) you snoop into her email and acuse her of adultery (which maybe she is guilty of) but now you want it to be all about her wrongs.
It simply sounds like there is still hurt and blame still on both sides here, and it may take a while to work out.