Most Helpful Guy
Every Situation is different and seeking revenge or feeding into his behavior could set you on a path that last years to get out of. On the other hand he might be truly remorseful and it could lead to a deeper re-connection. Best solution, from the limited question, is to live your life and if you cross paths address it as it comes. You will feel better, have less drama when the next one comes along, and not risk additional heartache. Best of luck in your future.
Most Helpful Girl
Ignore him if your not interested in forgiving him or getting back together. It sounds like he cares for you if he's trying to check on you to see if your doing OK. Everyone makes mistakes, if you think he's not capable of being faithful, or you can't forgive him, ignore it and move on. He will eventually have to do the same.