That's true, people change...

But the person he became or was when he cheated was not the one you married 12 years prior...

Now he is not someone you want to be with.

Aug '06: H moved out
July '08: H had a kid with the OW
May 12 '09: emancipation day

"Life moves pretty fast. You don't stop and look around once in a while, you could miss it." -Ferris Bueller