When I was young, I thought my mom was crazy because she would sometimes speak by herself. But when I got older, I think when I was 17 or 18, the same thing started happening to me. I would remember a situation that happened, like me being in an argument that I didn't win, relive that in my head and it would manifest in my facial expressions and even speech. Like sometimes I would catch myself saying out loud the things that I'm saying in my head, with facial expressions that I did at the time and all. I don't want to believe I'm crazy because it's not like I am seeing someone imaginary and talking to them. But maybe I am? I don't know anymore.