Watching her with another guy drove him crazy. He was hurt he didn't know how to fix it make things right. All he knew was that is over. Feeling foolish and betrayal thinking he found love. Its like they set you up and mess with your confidence. Feeling good thinking you are something you're not. Making you doubt yourself playing games because they got played. Trying to manipulate you but learned not to react give them the satisfaction. They cheated their way it will comeback to them.
The truth will come out exposing them. Working for something long term while they lie snake their way for short term.