How do you approach this?

Hi Brooke,

How do you approach this kind of situation:

You confide in someone about something. They tell a 3rd party. You approach them and ask why they told the 3rd party. The person gets mad at you for approaching them about telling the 3rd party.

A) Should I have done thought work on the person breaking confidence first and just let it go?
B) Has a boundary been violated?
C) Was approaching the person about telling the 3rd party in appropriate?
D) If the person who broke confidence is still mad at me, how do I proceed with them?