After spending a lot of time learning about what might be my illness, I think ocd and PTSD along with some of the personality disorders and even adhd, overlap in their symptoms a bit. I think of whatever it is I have like a cluster. The Cluster B personality. I hoped this would help you.

I had these epic crushes so much that I had a whole relationship with my imaginary version of that person in my own mind. Unlike you though, I did have some romantic involvement with them. Also I had plenty of real life romantic relationships with others. High sex drive.