How do you tell someone their partner is cheating?

Glad things got sorted out with little hate going around (poor bloke) although I must say I would've told him straight up about the situation. If he didn't believe me I would just step down and lay low until he found out himself. He'd pretty much come back to you and apologize for not believing you.

I had a similar situation happen to one of my best buddies but I was the only one who went up to him and tell him. When he found out I wasn't lying and the rest of his buddies didn't tell him, he pretty much told them 'talk to me again and you'll regret it'. Now we're just that closer as pals and he knows he can rely on me when shit hits the fan.

Edit: I'm pretty surprised that most of you wouldn't tell your friends about the situation. Either you guys aren't less friends and more acquaintances or just plain and simple, bad friends.

Jam it back in, in the dark.