Thanks for the reply. I talked to him after I found out he was talking to her. He said that the girl got a new bf, and he has a new gf - me, so it's ok to continue to be friends, talking to each other. I told him to be HONEST with me, asking him whether he wants to go back with his ex. He said he definitely does not want to go back with her b/c he doesn't want to go through the trouble again. However, I worry that they might talk to each other EVERYDAY through IM. They might also talk on the phone frequently. I really not sure what I should do. Should I leave him? I think I do love him.
We two started dating after they broke up for 6 months. Maybe he needs a LONGER time to get over a 6+ yr long old relationship?