I have talked to many woman (and men) and was told that their marriage was/has ending/ed (even those I thought was happy). I would ask why and they mostly had the same answer, social sites. They will say that their spouse had met someone else through a social site (either old high school love or someone new) and wants to be with them. I have one friend that one week her and her spouse was happy and took a nice weekend vacation with their kids and then the next week he left her. He found a girl on another social site that lived 3 hours away and he walked out, without warning or any indication he was unhappy.
Do you think that social sites have caused marriages to end? Have you been a victim of your spouse leaving due to a social site?