sorry to hear you are in this predicament. I hope you can find some peace with whatever you choose to do. If you do indeed choose to leave, i would start by making a plan - don't be in too big of hurry as you might forget to take care of something important, or might lose something in the home that has special meaning to you. Get finances in order, get car in your name if possible, get auto insurance in your name (actually, we should all probably do these things even if we stay.)
I truly am sorry. I know this situation stinks. I just left my AH of 15 years. Take care and try to find some peace for yourself soon!