Should i delete her off msn and facebook?

Just don't care about what she thinks of you, obviously shes not a very good friend to start with. shes probably jealous of you and that's why shes so mean. it sounds weird but jealousy can work in really weird ways. I think you should do everything you can to keep yourself happy. So if that's what you feel the need to do then just do it. If she confronts you about it, confront her about what she did to you and how her friendship isn't worth it to you. Tell her right to her face.---> not over text or email or face book. that's just lame.