oh boy tough day... I sometimes wonder if we have paired up with someone who has a genetic defect that does not allow them to stay with one person in a marriage...some people work so hard at it and others just act like they can take it or leave it.
I think we have society and Hollywood to thank for that. Marriage means nothing in our modern culture. Stay married as long as everything is fields of daisies, but at the first sign of trouble it's fine to cut and run. It's easier and better to seek a newer and better spouse then it is to try and save your M. That's the attitude, and our spouses have bought into it.