Ye I have an imaginary friend called Walter, he has been with me for at least 18 years. I only speak to him when no one else is around. But when I got really bad depression I would talk to him all the time. I don't know what he looks like or how old he is I just know he is in my head. Generally when I speak to him I speak to "people" too. I imagine "real" people being there and I will talk to them through him if that makes sense? He doesn't ask em to do things or anything like that. He just comes now and again. I tried cutting him out of my life when I was 23 and that made it worse as he kept coming back when I really didnt wnat him. I got frustrated and gave up. I was caught by a friend talking to him she sneaked into the room I was in. I was majorly embarrassed