Divorce rant

Quick backstory:
My husband doesn't want me talking to anybody of the opposite sex. I can't have any male friends, not even my best friend that I've known since I was 11. We've been friends for over 10 years. He gets jealous because of how close my sister's and I are. We had a rough childhood and made it through, so we have a really close bond. There's a lot more to the situation, but I feel this is enough for now. 
So, I can't have any male friends, yet he talks to this woman every single day. All day and night. He even told her that I'm too hormonal from the pregnancy. I'm almost 27 weeks. And that if the hormones don't go away when our daughter is born, he wants a divorce. He tells her how much he misses and loves her. (They work together) and has long conversations and vents to her about me. But then he tells me that he doesn't speak to any women. He keeps lying and treating me wrong and then when I bring up divorce, he gets mad at me and says that I'm just giving up and makes a hundred excuses why I should stay. I fee like everything he has ever told me is a lie and the only reason he wants me to stay is because he's scared of being alone. I don't even know if I should stay anymore.