I don't think this has anything to do with schizophrenia. I also like to pretend to talk to others, even when I am alone at home. Because a person is lonely, lonely and insecure. So I use words to relieve stress. And sometimes I can make up a big play by myself. A little smart. Hahahaha hiccups
Just because you feel insecure. Want others to care more about you. Usually this kind of person is also sensitive, just because a word from others will make him think for a long time.