Thank you all, your replies are just what I needed today!
Programmatic, I thought he had already hit his bottom which is what got him to enter rehab and start treatment. Maybe that was just a false bottom, tho, and he's about to hit the real one. I definitely do not want to get in the way of that.
Getting By, I think I sometimes have that "S" on my chest too, LOL! I do know that everyone else's problems are not mine to solve, but when I'm more directly affected, it's harder for me to resist the urge to try. I guess that's where the "perceived responsibility" comes in--so it's my perception that needs to change.
Babyblue, it seemed to me just a week or so ago that my friend was trying to move on from me as well as from the company, so what you say about him perhaps tossing me a hook to grab is interesting. Because if he is finally reaching out to me, it doesn't make it any easier to leave him be, but I know that's what I need to do.