Oh wow - what a mess !! Sorry your friend behaved so badly at your party. That was not a very nice thing to do. I think you are doing the right thing to just walk away from the relationship for now. It is possible that some day in the future you two may cross paths again and she may be a different person .. or not. Best to leave it alone for now as it doesn't sound like she is able to be a supportive friend.

take care,