Looking for some insight on these intense dreams

I was with this guy for just short of 3 years, we lived together for 2. We broke up in February of this year but continued to exclusively see each other and work on the relationship until June. In June we cut all ties, no contact, don't see each other, etc. For the first month or so after that everything was fine, I had no dreams about him or anything, NOW all of a sudden I am having dreams about him almost nightly and they are usually very intense.

I have never, ever, been the type of person to have reoccurring dreams. But this is insane, I literally cannot get a peaceful night in and it has been like 3 weeks now. I wouldn't consider them nightmares or anything, they are all very happy dreams where we are reunited or we're moving back in together or doing something that we liked to do together...

However, 2 nights ago I actually had a very intense dream that I want to share. Most of my dreams are relatively foggy, little control on my part, I get the idea of what's going on but don't really have any control it and most of the time what's going on makes no sense. This one was different, it really left with me feeling shaken up the next morning and day afterwards.

Had this dream I was with my best friend near a place where you could often find my ex. As we were leaving this place I said "Hang on one second, I want to look out here before we leave to make sure [my ex] isn't around. I don't feel like seeing him today". I opened the door and peered out, and of course he was there with a couple of his real life friends. I closed the door, walked back in, and said "Ok, he's there so lets go out the other door to leave". Then she opens a window in this place and starts screaming out the window at him saying that I'm there. So at that point he walks closer and we go outside and him and I nod heads at each other, but for whatever reason I decide to go up and talk to him, and everyone kind of steps back and gives us a moment. I ask him how is, says he looks good, and drop in there an I miss seeing you. All of a sudden I look up at him, and I swear this is the most clear thing I think I have EVER seen in a dream, he looked absolutely perfect just like himself. I can still see it clearly in my head, every detail on him was clear as day. So I look up at him and he's crying, and of course I start asking him what's wrong and he's clearly really upset about something. I start trying to talk to him and then I just wind up getting upset because he's upset and start crying as well and have one of those spill your guts moment where I just told him I missed him, didn't want to be like this anymore, told him I care about him, etc. And he agreed with me and we hugged and then I woke up.

Obviously not the best thing in the world to wake up to, but this dream was SO intense. I just can't get it out of my head. It's especially frustrating because I feel like he's going to be back. I don't know when, but I can just feel it in my bones that he'll be back around some day.

Any idea what's going on here? Or better yet any idea how to stop these dreams?! They're killin' me.