Is it normal to dream about a former crush all the time?

I had a major crush on Larry (not his real name) for a very long time, six years to be exact. I'm over him and have been for a couple of years now. However, for some strange reason I still keep having dreams that involve him. For example I dreamed about Larry being over at my house the other night, and I also even dreamed about him and his girlfriend a couple of times. It's really odd because I don't even have a crush on Larry anymore, let alone have anything to do with him anymore. What does this mean? Is this normal?