My therapist said that usually when the spouse walks away suddenly, they have already mourned the demise of their marriage, which is why my ex was ok drinking beer and chatting up a storm as if nothing was wrong--FREAKIN AMAZING! He was chatty and happy because he already knew that he was leaving the marriage.
Yep...that's just exactly as it goes. Of course, while this is an explanation, it is not an excuse. Hiding how you feel, what you're considering, and/or what you are doing violates that cornerstone of marriage...TRUST! If you are willing to break that trust, you prove yourself to be without (much) character.
