I know he seems real, but he's not, trust me. If you can hear him and he says nasty things all the time but you can't see him, he's what's called an auditory hallucination. It's hard to tell the difference between hallucinations and reality. Pretty much always.

Have you ever tried seeing a doc for an antipsychotic? I'm on one and it gets rid of 99% of my hallucinations. It should get rid of three.