[carapace]

Quit. Today. This guy is sick-- mentally and emotionally ill --and you need to cut him out of your life and never have anything to do with him again.

This is way more important than that paycheck.

You'll be fine, one way or another. This isn't really about your boss, it's about you and your self-respect and fear of change and stuff like that. (I'm not going to try to psychoanalyze you from across the internet but this much is clear from what you wrote.)

Also, fire your therapist, as you are clearly getting ripped off there.