Situation with wife. What would you do?

I work 40+ hours a week. We have a child and I watch our child every day after work for five to six hours. She works four days a week, I get off earlier and so I always buy or make dinner. She eats and then goes to lay in her bed and watch movies, because our child is hyper and she gets mean and stressed.

On the weekends I watch our child for 80% of the time. I never go out drinking with friends, never party, I am always home taking care of our child.

I pay 80% on the bills and rent. I buy 80% of the food. I also clean the house and do dishes.

She is never, ever happy. She comes home from work and says, I missed you all. About tweny minutes later she is usually annoyed and angry about something, so she goes in her room and shuts the door. On the weekends she starts arguments about nothing, saying that no one cares about her and that she is lonely. We don't have a lot of time alone because her family is useless and gives us zero help, and my family helps but they are all older and can't keep our child overnight.

She had a friend over to watch a TV show and they sit in their room and laugh and giggle like teenagers, she acts really happy. Then her friend leaves and she is immediately annoyed again.

Last night she said her friends want to go out dancing for her birthday. I said, if Im told you that a few friends and I were going to a dance club, you'd say hell no. Because they are places for picking people up.

She flew off the handle and said I am over controlling, I need help, etc. I said, can't you all just go see a movie and dinner, normal adult stuff? She is in her mid 30's. She said from now on she will just do whatever and not tell me.

We have talked about seperating, but she always realizes that without my income, she won't be able to afford a decent apartment, etc. And then she gets all love and flowers and says that she can't live without me, it will be fine, etc.

She has pretty bad abuse from her childhood. She is literally like a selfish and lazy child. I hate arguing, I hate drama, but I also hate being taken advantage of like this. But, the thought of splitting up and seeing my kid's life ripped apart, and the thought of trying to date again, it makes me feel sick. I am in good shape and I have had women ask me out to drinks at work and such, but I just see the problems that come with it.

What would you do, GLP?