It doesn't sound likely to happen, and also shows his level of respect towards you. If he was seriously contemplating a reunion with you, he should have broken off communication with the other girl. That said, once a cheater always a cheater (I know because I fight with those tendancies myself). Chances are that if he DID come back, the same thing is likely to happen again in the future. I would try to make as clean of a break as I could. BIG *IF* TIME.... IF you have children together, i would recommend waiting to see if there will be a reconciliation. On the chance that it actually does work out, your children get to have a father in their life.