In actuality our spouses have been unhappy and planning their escape for months or even years. We've been wronging them in ways we weren't even aware of and they are sick and tired of it and ready to move on.
Sometimes we've been wronging them, and sometimes they just get an opportunity they decide to pursue through no fault of ours, sometimes it's both. Dissatisfaction isn't a necessary precursor to cheating, only opportunity. I point this out because its natural initially to feel that it's your fault, or that you're inadequate, or that you drove her to it.
A year down the line you might conclude that you really were a good husband who had flaws like anybody. The WAS chooses to leave versus addressing the issues and working on them -- that does not make the LBS automatically guilty of shortcomings.
Accuray
Married 18, Together 20, Now Divorced M: 48, W: 50, D: 18, S: 16, D: 12 Bomb Dropped (EA, D): 7/13/11 Start Reconcile: 8/15/11 Bomb Dropped (EA, D): 5/1/2014 (Divorced) In a New Relationship: 3/2015