Most Helpful Girl
People want to know if they made the right decision, so they hope that they are doing worse, to give greater clarification to their decision to split with them. I actively avoid websites like Facebook, simply because I do not wish to be tempted to 'research' that specific person in case I don't like what I see. I don't wish him ill-health, he was a big part of my life for a important part of my growth.
We tend to have these thoughts when we are feeling down. We try even the most irrational models to lift our mood. It isn't healthy so I suggest trying to preoccupy yourself, or talk to a friend about the way you are feeling. :)