“I’ve been catfishing my friend”

I was friends with three girls. Let’s call them Cayenne, Cinnamon, and Mint. Cinnamon and I suddenly stopped being friends, so I became friends with Mint, who Cinnamon had problems with. A few months into my friendship with Mint, she told me that she had been catfishing Cinnamon as revenge for bullying her. Cayenne was still friends with all three of us at the time, having to keep her and Mint’s friendship secret from Cinnamon.

Mint eventually got me to join in catfishing Cinnamon. After about six months of catfishing Cinnamon, Mint, Cayenne, and I broke up. Since this had happened, I’ve had the urge to tell Cinnamon who we really are, but I know it would cause an end to Mint and Cayenne’s friendship, and I don’t want it to look like I did it just for them to fight. What should I do?