Why stop living your life for that person that may never be back... as you have a life too!! maybe it wasn't meant to be... just do your thing if it comes back to you then it may be meant to be.. Why waste your precious time and life wondering why he won't either commit or stay with you.. (think about this.. if he's like this, would you want to be miserable in it for life - no life's too precious) Personally it's a personal choice the reason people do go back for what?? they are accustomed to the comfort zone no matter what the person did to you.. I always believe, once a cheater always be a cheater. YOu can't force or change the person you want them to be, but to accept who they are. I would move on as I know it does get better after learning what you want out of a relationship, never settle for LESS!!!!.. I also believe if they do it right the first time, then this wouldn't have happened!!