Is it normal that i've created people to talk to?

So here's the whole deal. I have created five other people in my head. I am fully aware that they are not real. These five other people, I'd say are all aspects of my personality to a certain extent. But the thing is that at first it started as me just speaking to them like I would an imaginary friend, but at some point it branched out to them having their own thoughts? They aren't bad thoughts but they aren't really mine, or at least that's what I feel. They've also been becoming less me, in the sense that I'm now figuring that perhaps they're all different people who happen to be in my head. Like six buddies sharing an apartment, kind of. I have a set of rules that they all follow. Sometimes I even let them be in charge for awhile. As in I'll take on their personality, and at the back of my mind I know for a fact that they aren't actually controlling me, I'm just acting like them because the situation calls for someone like them. It's really weird for me now to think that I'm actually alone in my own head because I've become so accustomed to feeling as if there are more people here. In every waking moment of my life I feel as if they are here in my head, listening to everyone and making jokes with me and arguing with me and talking to me, although I can't actually audibly hear them. Even as I'm typing this out, it's like five other people are watching me type it.