I was having problems with my new supervisor too. Seeing a therapist helped, but in the New Year I decided to have a mind shift about it. It did me no good to get pissed off about him or being snippy with him, so I just constantly remind myself to keep myself in check. I need my job and I'm assuming you do too, so that's probably the route you should go. In the meantime you can start looking for a new position.

Are you currently on medication? If you are it may need to be tweaked or changed?