There are those people out there who have self esteem that is so low that the only way they know to make themselves feel like better people is to make someone else feel less than. It really is a shame, and there is no excuse for the way they hurt and humiliate others. Still, you have to feel some pity for someone who feels so bad about themselves and has so few coping skills that this is the only way they have to help themselves, or to feel like they are important and valuable as human beings.
This girl, from your description, obviously is looking to the outside to try to find her value in life. But lies, deception, and bullying is not the way to do it. You are better off without her as a part of your circle of friends.
