I hate to ask such an impersonal, ignorant question, but has he received a specific diagnosis? When you talk about how he is depressed, do you mean this in a clinical, diagnostic way or just by way of a lack of any other term?I hope all goes well today. I know it will be hard, and I know he will will be angry. I suspect he may say all sorts of hateful things, and if he does, be strong in the knowledge that your actions are fuelled by love.I am so sorry this is happening to you. I am thankful that you have told us what is happening. I reckon that is not always easy for you, being the private person that you are. We want to be supportive while at the same time avoid being intrusive. Forgive us if we come off as the latter. We just love you and want to help.
Since you are going there, you might ask his boss if he's noticed anything, gathering as much info for the judge you can. When my brother (the guy who smoked that crap) lost it, his boss actually is the one that got him into treatment! He was the first to notice a problem, so his boss may also have some insight for you. And possibly, maybe even help your case to help Andy.