Is there anything for which you would betray a friend?

I will never betray a friend because friends arev like another brother or sister,you can have with them.If you have a secret and you don't want your parents to know.Your friend will always be there.Some people are going to hate my friend,so they are goint ask me because im close friend
to do something harm his emotion,feeling,or physical.Like io said i will never betray my friend for nothing.