Oh honey, I feel you! I had a boss like that. Total narcissist. She would make me sit in her office and she regale me with stories about her personal life, and then we'd go out. She'd put me down in front of everyone we were with and would say things like "You're paid too much".

Get that resume handy and up-to-date. In the meantime, I'd also see about getting some help for you. What are you doing for your depression?