How can you broke up your friendship?

In my case I think I better talk to him and ask him why he did that to me after that I had trusted him.I will let him realized how important our friendship by ending it with a good conversation.

If she is my confidant,I think she won't share our secret with others. I have many friends,but only a few confidants. I select my friend,so if I define she is my confidant,she should be good enough. If she do a large wrong for me,I would feel very very sad,because I spent a lot of time and heart in her. Maybe I will forgive her.

I hate people who tell your secrets to others especially after promising that he/she won't tell. Simply tell your friend that just need some time to cool off and try to avoid him/her for a while. Tell the reason why you are doing it and make sure to express how offended you are.