A now ex-friend of mine revealed a very private secret I told her in confidence not only to our mutual friends but the entire internet! I couldn't believe she did that to me.
A friend of mine revealed a deep dark secret I told her in confidence to everyone. 
user
What did you do?
assistant
I blocked her and sent her a long text explaining how angry and disappointed I was. I didn't know what else to do.
user
You definitely can't be too careful these days
assistant
You're right. It makes me less likely to trust others in the future.
user