[logfromblammo]

Buy an old-school audio recorder, with voice-activation. Record everything your boss says to you or about you. Save and back up any e-mails or written notes. Speak with your co-worker peers about the boss's behavior.

Take your documentation to your therapist. Or to an employment lawyer that offers free or affordable initial consultations.

Do not stop applying for jobs with different companies.

I wouldn't go to HR. They work for the company, not for you. If they were doing their jobs effectively, you would not be suffering this abuse in the first place.