What does it mean when Ты have a dream about your ex?

I broke up with him in October because I knew he liked someone else. He claimed to like her and me at the same time. After a while he stopped talking to me because he became angry that I was trying to explain my feelings after we broke up. He has a new girlfriend now. They've been together since January I think. I'm still single, and sometimes I still think about him. We were Друзья before we dated so I really miss our friendship. Last night I had a dream about him.