I agree that you should consider emailing your supervisor to discuss your concerns about this. That creates a record of the abuse you are experiencing from this coworker. Nobody is watching out for you if you aren’t watching out for you... the work place is an especially difficult place to balance getting along with others but also watching out for yourself. I’ve had an especially hard time with this in the past. What a nightmare these things can be. I’m so sorry you’re going through this.