How to cope with your dreams

I've really been trying to move on since the break-up of my common law marriage. Since I didn't have a chance to have any closure with my ex, I've been going to therapy, I've gone to 2 divorce groups, I journal, I read, I exercise, I dated someone else for a year. I daily still let myself grieve, if I feel like it. For instance, I let myself cry if I feel like it; I will talk with others when I have something troubling me; I've tried to develop and continue to develop a good support group. Lately, I've been feeling really good. The problem is that I will have these dreams constantly with my ex in them. In some of the dreams he's cheating on me and I even encounter his new love interest. In other dreams, I re-enacting scenes that took place during our break-up phase. In some dreams, we are just doing ordinary, mundane rituals, like house cleaning or yard keeping that we used to do together. There are a lot of dreams where we are actually having fun together say at an amuzement park, a rock concert or a water park. No matter what the context of the dream, I'm terribly shaken after the dreams. It takes me days to recover emotionally from these dreams. The dreams seem to live through my betrayal situation over and over. I've been living like this for about 2 years now. It's gotten to the point now where I dread going to sleep. I find myself watching movies, reading, cleaning, reorganizing everything to keep from going to sleep. If anyone has any suggestions. Am I the only one experiencing this encounters with my dreams. Does anyone else having these nightmare/ex-dream encounters? I haven't physically seen my ex since we had to legally meet in court.