Post up a prayer on Facebook for all to see forgiving her for causing trouble and wishing her the peace she needs to go on. End it encouraging everyone who knows the two of you to pray for her. That should take care of it because it shows you are the bigger more mature person and are the opposite of anything she says, plus she really does need the prayers if she is doing harm to you. Your true friends will stand by your side no matter what. I will pray for you both!