Every time I think I've moved on

This is my first time posting here and I'm not even too sure what I'm trying to do here. I guess just to get some of these thoughts out.

January of 2018 my girlfriend of almost 5 years broke up with me. The rest of the year was difficult... I thought she was the one. By the end of the year, I was feeling better. I wasn't thinking about her everyday, I went back to school, I started talking to new people. But just when I feel like I'm starting to heal, she comes back into my life somehow. We left things on good terms and still care for each other and want the other to be happy. She's called me and I've called her a handful of times in the last 6 months, but I haven't heard from her in weeks.

I woke up this morning after having a dream with her and some guy she's been seeing. They seemed happy. Even in my dreams she's doing better than I am...I guess I'm just feeling a little lost. I want to be happy. I want to move on. I've had flings but nothing's ever come of them. I want a relationship. I want what I had, but that's not possible. I can't replace her, I can only hope to find someone else that I can love that much.

Thanks for anyone who takes the time to read this or respond.