system
Given the following post, respond as if you're commenting on Reddit:
human
Why do people keep dreaming about their old friends/relatives even though they're no longer in touch?

I keep dreaming about my childhood friend for years. I have not seen the guy for at least 6 years and even before that we went to different high schools, so we weren't in touch since elementary school. I finished university and still have dreams about him once a month. I don't consciously think about him, I don't wonder what he's doing but I keep seeing him in my dreams. It started to freak me out. Is there a particular name for this in psychology? Why do I keep seeing him?
gpt
Because the stories of our dreams, are compiled from our memories, worries, concerns, etc.. **The only thing your brain has to use as content matter for dreams is what's already there.** 

If you've seen it, experienced, or have ever thought about it, it's a possible inclusion. 

Then, the more you worry about it, the more it is top of mind, the more you will often see it. 

It's just how our mind works. Dreams are nothing more than stories that our brain puts together while you are experiencing random neural firing (think of those firings like a sleep release of sorts).....

...and what the brain pulls for content can be random or something you've thought about, but it can certainly pull from memories many years passed.