Depends what you mean. Do I talk to myself in my head and have mental/imagined conversations? Yes. Who doesn't do this?
However I don't have verbal conversations with myself, I don't talk out loud as if there is another person with me.
One of my siblings used to do this when he was unemployed and trying but failing to get a job for a while, in addition to going through a breakup. We were both living with our parents at the time. He would have super negative, angry conversations with himself out loud. Tons of swearing, hatred towards himself and others....
It legitimately scared the hell out of me, I worried for his mental health and sometimes even for the physical safety of myself and the rest of the family (when he had huge angry blowups which for a long time was a weekly occurrence). Luckily he's doing a lot better today (as far as I know but as I'm well aware people can hide how they really feel).
I'd never tell my sibling this but his behavior had a negative impact on me. It's hard to explain how I felt about it and the impact it had on me but I just know and can feel that it did affect me (I'm not very good at describing my own feelings, idk why but it's like I don't have the language/words for how I feel a lot of the time) but his breakdown kind of made me realize just how fragile our mental health is. It also fractured my perception of my family.
I think one thing that really bothers me about that phase in my life is a motif in my thoughts for the past year. As I get older I come to realize more and more just how uncertain things really are, how things are always changing and things don't stay the same. How limited and biased my thinking and perception of everything really is and how not only is physical life itself changing but also I myself am changing. Even my own perceptions are fragile and subject to change dramatically as I gain more experiences through time.
I don't really know how I feel about this fact about life and our mortality as human beings. how questionable all of our perceptions are and how life seems to have a way to challenge our views when previously we felt so certain and were comforted from that little shred of certainty in such a complex and constantly changing world.
Ha sorry, I went on a tangent but this topic just reminded me of a phase in my life I'd rather forget about but is like a stain that is hardly visible but noticeable enough and will never go away.