I used to all the time as a child, when I was in fourth grade someone said they watched me talking to a tree which I don't remember doing. But not anymore, at least not conversations with myself but rather just one sentence or something even when I'm with people
I imagine conversations with other people in my head and sometimes I get so into it that I begin to talk out loud without realizing
Omg this ME. Except I don't say the words out loud, I always like mumble or accidentally lip them.
Like I will sit here and talk to someone for 10 minutes and then realize and say to myself 'Wow, I'm basically talking to an imaginary friend. I'm so embarrassing'.