Most Helpful Girl
Be prepared to immediately help her pack and move her stuff to somewhere else when you do this. If she's bonkers enough to pull a knife on you last time you tried to break up, then she'll go to greater lengths this time. If you are really concerned you could ask a police officer to be there as well. That way, she can't do anything stupid and try to make it look like your fault (like with the knife). I would also let her know that if she doesn't go peacefully and leave you alone, that you will file a restraining order against her. It won't be easy, it won't be pretty, but it MUST be done. Also be prepared to change the locks on your house. I hope she doesn't mess with your car or anything :-/ Once again, won't be easy, but the longer you wait, the worse it'll be.