Family drama?long story short...?

Okay,so,me and my uncle are close,we hang out alot,I recently found out he's cheating on my aunt,and this hit me pretty hard in a way,I told him I wouldn't say anything and that he could trust me,I eventually ended up telling my dad,feeling I could trust him,but he ended up telling my uncle's mom (they are only half brothers) and she ended up telling him.now everyone is pissed at me for telling.how di I straighten this out?should I own up to it?i thought i could trust my dad...I'm not in any shape to be dealing with this right now,I'm mentally unstable.