Family therapy would be my suggestion. Set clear goals in the session and ways to work on them. If, after a set amount of time, this is still going on, then you've given it your best shot. Leave. Don't blindside your wife, share these feelings with her in the session and let her know this is the last shot this relationship gets. Your personal happiness is being effected negatively and I know that can't be good for your kiddo.

If therapy isn't an option, sent the kiddo to a friends house or to grandma's for the night and sit down and have an open, honest heart to heart with your wife. Be prepared for all the of the awful things she could say but don't react. When you don't react you can't further the situation. When she's done raging, have three goals set. One you would like to achieve, one you would like her to achieve, and one the family needs to achieve by a certain time frame. Make sure the goals are measurable and not vague. For example, instead of: I want you to be nicer to me, you would make the goal: I would like for you to not yell or cuss at me this week. It states what you want exactly and gives a time frame and is measurable in definition of parameters and time. Also discuss what will happen if those goals aren't met. When I tried to stop biting my nails, I had a nail jar. Each time I caught myself I had to put a dollar in and couldn't touch it until I stopped. If I was successful in not biting my nails, I got a nice pedicure and massage from the money. If I didn't, it went to a charity.

When you talk about her goal, give her the opportunity to formulate it herself. If she chooses not to, make two or three and let her choose the one she wants to work on.

Also set a time frame for how long you are willing to work on it. If things aren't better by __________ date, then I will make arrangements for myself to live elsewhere and file for divorce.

I am sorry you are going though this. Being in a marriage and working on it when you really don't want to be there is tough.