Missy

This person knows, trust me. If this person is somebody you don't see on a regular basis, the people who do see him/her on a regular basis and are close to this person have already told him/her. As a couple of others have alread pointed out in this thread, until he/she is ready for help, ready to admit they need help, you are only risking losing a good friend, or at the very least, putting some distance in your friendship. Trust me, I just went through this with somebody myself... somebody who (deep down) knows, but is still not willing to admit it even to themself, let alone somebody else. The really sad part is that everybody sees it except for the person I'm referring to.

It's a very hard thing to stand back and watch somebody on the path to self-destruction, but all you can do is be there for him/her when they finally realize, and just pray that it happens before anybody gets seriously hurt.