I have no clue what I should type in the search bar to figure this out and I'm scared to bring it up to a professional until I know more so here goes - hopefully someone has also experienced this. 

No clue when it started exactly but for the last ten or so years of my life (I'm 23), I've experienced feeling a presence around me a lot. Not like demonic or anything though and I feel safe I just don't know what the fuck it is. 

Basically, my brain will pretend figures of people are with me all the time. Usually it's people from TV shows or books I've recently watched or read that I admire and would want to be friends with. Best example I can think of is pulling characters from The Inheritance Cycle by Christopher Paolini and "interacting" with them (playing music, smoking a bowl and pretending they're just chilling on the couch - they don't speak, they're just there). I know they aren't real but I pretend they're there sometimes when I'm lonely and need the comfort of someone that I don't fear will judge me. I suffer from both anxiety and depression and this has been less so since I weaned off my latest medication (20mg Citalopram - had to stop because it was making my eyesight deteriorate) but it's still there. 

Backstory: I am the youngest of six siblings in total but only grew up with one and he went away to college when I was 12 so I was alone a lot of the time as I was being homeschooled. Father was a trucker, was away for most of my childhood and then my parents separated shortly after the brother left for college. Lived with my Mom who also suffered from mental illness and whenever I mentioned anything about something feeling off she shut it down immediately. I think she was terrified that I was suffering like she was and while I don't blame her, I wish she had been more willing to listen than getting upset with me. That shut me down and so I suffered in silence as the years went on. Never mentioned this shit because my parents are religious and my Mom thinks demons can be the cause of depression. No thanks, young me didn't want to experience an exorcism lmao

So, my question is...is this something that can happen when you're a lonely af child/teen with no one to relate to and is there a name for it? I don't really want to get rid of it even though it can get annoying since it's hard to feel truly alone (getting better at that tho) but I don't like feeling in the dark about it. Thanks! 