Try not to worry about that woman... sometimes you discover things about 'friends' that alter your view on them perminantly.
In my case i've just wrote them off from my life and moved on. It's pretty easy, just focus on some of your other friends and you'll soon have more then enough people to take her place in your life.
Personally I wouldn't go back to her, even if she says sorry, but it's entirely upto you....
Not that it needs to be said, but I don't agree with a word she said, quite the opposite