One of my classmates continuously sends me some screenshots which he believes is the proof of his phone being hacked, and he insists that his life is under surveillance by a hacker. I have looked through those screenshots and his phone and it turns out nothing wrong. From his way of talk and facial expression I suppose that he got Schizophrenia and got a victimization delusion. How should I convince him to go to the hospital?
(not a native speaker so plz correct my choice of words if wrong.)