You have had a lot happen in the last week or so. Don't make any snap judgements to D or not yet.
I do know that he needs help if he'd depressed, because otherwise the same thing could happen easily again. Depending if it is chronic or not, some depression (from what I remember about being depressed) is situational - meaning it happens while going through a tough time. I think this type just lifts when a situation is over with. What is worse is if it is something that is more chronic, which may not go away without drugs or counseling. I expect I always have a minor depression - not any big deal, but I have had two times in my life that I remember going through a major depression. Now I can diagnose it and fight it off (I did this year, it was tough but I did). But I had to understand what I had first - and that took some counseling and for a short while I took drugs too.
Depression is really serious, and he should get help.
