Question: why do  friends backstabbed??? 

Answer: People backstab for lots of reasons.  Like the previous young lady mentioned...sometimes it's jelousy.  Other reasons is because that person has no respect for you or anybody else.  People backstab because they're selfish and want something for themselves and don't care who they have to hurt to get it.  It's best not to associate with those people.  They cary bad Karma and that's something nobody wants.  People that do that kind of thing are toxic and you should stay away.\nBest of luck.
This question from the Yahoo Q&A forum is categorized in the topic: Health