Yes, like searock says....this has nothign to do with how 'women' think.
Let's keep it simple. You said she's a really nice person.....deep down. Which tells me that on the surface she's all kinds of awful. She also seems to have a severe drama issue. The question you need to ask yourself is......do you love the person she is deep down ENOUGH to overlook and put up with all this drama?
I can't explain to you why she's doing what she's doing. I'm just telling you to make a decision about what's more important. Her love or your sanity.
Live as if you were to die tomorrow. Learn as if you were to live forever. - Mohandas Gandhi