Kris says, "...don't just expect a friend to keep your secrets, any more than you can just expect them to conform you your own moral codes and attitudes."

Good point! Tiree, you can save yourself a lot of grief by simply seeing this experience as a lesson in risk-taking: you're the one who took a risk by taking X into your confidence. Basically, you have only yourself to blame, so grasp yourself by the throat first before lashing out at X!