Thank you for the additional information. It helps.
It sounds like you have done all you can to help your wife improve her behavior. She is basically attempting to control you by acting like a bully. And her lack of insight or willingness to get help leaves you with few choices.
When someone will not accept that they have a problem, then there is really nothing anyone can do to change them. When the person is not willing to change, then no one can force them to change. The only thing you can do is react.
It would be best if your wife was willing to see a therapist. You are right, seeing a psychiatrist is great, but without therapy, your wife is stuck where she is. But you do have a choice about what you want to do. Before you decide to leave your wife, try seeing a therapist yourself. Even if you choose to leave her, you are going to have many unresolved issues from how she has treated you. Seeing a therapist can help you not only decide if you want to leave the marriage or not, but it can help you learn to cope with the feelings you have about your marriage. To find a therapist, talk with your doctor for a referral. Or if you attend church, speak with your pastor. You can also search on line at http://therapists.psychologytoday.com/rms/.
Consider a separation. See if it helps your wife gain any insight into her behavior. Sometimes time apart can make a big difference.
Also, you can talk with your wife. Tell her you are considering a separation or leaving the marriage because of her behavior. Let her know that you have tried to help her, but because she will not get help, you need to protect yourself. Tell her that you would like her to get help by going to therapy with you. If you tell her these things, it will give her a chance to see the effects of her behavior. She may not listen, but giving her that chance is important for you and for her. Then if you decide to leave, you can say you tried the best you could.
Here are some books that can help you decide how to handle this situation:
Should I Stay Or Go? : How Controlled Separation (CS) Can Save Your Marriage by Lee Raffel
The Four Factors: Should You Stay, Go or Improve Your Relationship? by Ron Gentile PhD
The Emotionally Abusive Relationship: How to Stop Being Abused and How to Stop Abusing by Beverly Engel
You can find these books on Amazon.com or your local library may have them for you.
I hope this has helped you,