Been there, done that. All I can say is I'm sorry you're having to go through it. You have two choices here which are suffer in silence or confront him with your chosen method. If you've been with the guy for a long period of time I'm sure you've made your feelings known in the past and are probably to the point where you feel like you're in the twilight zone.
I agree with the previous sentiment that these guys get what they deserve in the end. Just keep in mind that sometimes standing up to guys like this end with them sabotaging or flat-out firing those who oppose their regime. I have personally witnessed that occurring.
Good luck.