I am very sorry your boss is not very nice. Right now I am lucky because I have a really understanding boss, but I have had really terrible bosses in the past.
The first thing you want to do is search for other jobs in your spare time. I know this economy is awful and that is hard to do. At least you will feel better that you are trying to get out of the situation.
The second thing to do is to tell yourself your boss must have his own issues. When someone tries to make someone else's life so unhappy, it is because that person is usually miserable and trying to drag everyone else down with them. Keep that in mind when you have to deal with him. There is something lacking in his own life. You can be the better person and pity him instead of being angry with him. That has helped me when dealing with a bad boss.
I hope this helps you and I hope you get out soon!