>Friend A and Friend B are dating or EB'd
>about as close to both
>Friend B keeps asking me to plap them, even though A and B are supposed to be exclusive

what do fuck should I do?
I could tell A, and it could nuke both friendships
if I plap B, I'm an asshole and awful friend to A
if I do nothing, I have this knowledge of A being cheated on and I'm doing absolutely nothing about it for my friend, though there's the argument that it's not my business