So a friend told me a secret of someone. The person was telling it to me themselves and I let it slip that my friend told me. They texted my friend asking them to stop spreading rumors. Friend sent me a screenshot of the text and said "thanks." I refuse to respond to passive aggression but I live with him and he's in my fraternity so I'm not going to simply end the friendship.

Thoughts?

edit: He is consistently passive aggressive so this is not just about this situation