My T warned me near the beginning of therapy that I would start talking to him in my head. He said it's actually a goal of therapy that he become a "character" in my head and in my internal conversations. He said that was one of the ways we would know I was done with therapy -- when I could have the conversation with him in my head and know accurately what his response would be, and then be able to act on it and incorporate the healthy response to the situation into my life, without ever having to actually talk to him about it.