I think I know what you mean.

I had a dream recently, in which I was being chased. Someone was trying to change me, to turn me into something else. Normally I'd be scared but this dream was different. There was someone with me. They were dressed in dark clothes, male and blonde with short hair and I was sure I knew them. It was just this feeling, as if they were an old friend who I hadn't seen for a long time; a deep feeling of reassurance and safety. Not once in the dream did I feel scared. The person chasing me was trying to get me onto a train and so I deliberatly got on the wrong one. I left behind all my luggage, I jumped off the train, I ran through the countryside and ended up swimming for a boat. All the time we were running together. In the end I gave up and transported myself away to a forest. When I looked the person was gone. I looked again and this time I glimpsed a fox or a wolf between the trees. I'm sure it was them.

There have always been people in my dreams, but this was the first time that anyone has seemed real. Normally people just flicker in and out. The person has been in my dreams once or twice since then (Most recently they encouraged me to turn and face and fight the monster in a nightmare.), the appearance always different but the feeling I get around them always the same. Safe, content, as if I've been missing something for years and now I'm whole again. I have had many theories as to who they are, from a part of myself to someone in real life with whom I have a psychic link. I still don't know who they are but I don't think I'll ever stop wondering. They felt so real it's hard to believe that they're not.

Is this similar to what happened to you?