can't get over my x

I’ve been divorced for 6 years now. My former husband I have a 9 year old daughter. We have known eachother for 13 years. The problem is, is that even though we are divorced, we have always been on and off for as long as we have been apart (me always hoping we would get back together) I am the one who left, because he was a screamer.Now, this past year, he started dating a women who was a freind of mine, I’ve been so hurt that It feels worse now than the day I moved out.I cannot get over him and the hurt. I have also not dated anyone else the past year, even though many men have asked me, I just do not feel like it.I’m starting to feel ready to go out now, but I am still having a hard time getting over my x.What can I do? It’s so hard because I still have to talk to him quite often about our daughter. Any advice???