Oh my god! I am relating to so many people on this thread, I never really told anyone about it. But what's even weirder is that if there is a poster of someone in my room I'll just start talking to them as if they were real. I often make up fake scenarios in my head or just talk to them as if they were with me all day and know what I am talking about, LOL. I also do this quite a bit when imagining fictional or celebrity or friends irl with me in the moment when I am doing something and it's like I can imagine them with me laughing and talking to me whilst I am doing the thing, i.e Cooking with a certain youtuber or when I went skiing I imagined Draco malfoy with me. Okay that is a bit weird. But I've been doing stuff like this since I was small because I am an only child who spent a lot of time playing barbie in my room on my own.