I hope you are able to get away safely and heal.
Discretely gather all of your personal items like birth certificate, social security card, slowly move to a new bank account and credit card to establish your own independent accounts. Find a place to stay when you leave (do you have family or friends you can stay with who will respect your decision?)
Research how to leave an abusive relationship, some advice is directed at women, but there is still value in the advice regardless of gender.
There is an article by a woman named Maddie from Australia that outlines how to safely leave the relationship. Try Google since I can't post a link....
Act normal up until you make the break. It's like playing a role to keep you safe.
Once you leave, speak to her only to settle assets and anything legal, such as divorce proceedings.
She will try to pull you back with all the emotional tricks she can. Don't let her.
I sincerely wish you all the best and safety and sanity 
After you've made your break from her, look for a good therapist who will be able to help you sort yourself out and heal.
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