Opinion please....

If a friend told you a secret... and you believe that what they are doing is "wrong". You've told this friend that you think it's wrong and they should stop, since it not good for them emotionally (and financially). You know that it's unlikey that they would listen you, would you break your friends trust by telling someone that they highly respect and is more likely to help this friend?? Is it worth the risk?

Maybe I should keep my nose out of it.... But as a friend I feel that he needs to stop for his own sake, because at the it's not going to be worth it in the end ...

edit/... ok... now apparently some of the secret is untrue.. since he was drunk at the time... but i dunno... does a drunk person become more honest??