Hi scrayvic,
Wow, that's quite the story.
I am kicking myself for not seeing this sooner and am also very sorry for the unneeded crap my children have had to endure because of her.
Don' be hard on yourself. We're not medical professionals that can diagnose a serious mental illness, it sounds like did the best that you could. And identifying your feelings may come later on, maybe your FOO didn't express their feelings, you're writing your story down, that step is going to help you heal. It helps to talk.