Lost or confused...seems to be the code word for depressed. I agree with rr22- self medicating. The important thing to remember is that you are not responsible for this and there is nothing you can do to pull him out of the hole that he dug. Remove yourself from the situation as much as possible..you can be there for him...but do not let his moods dictate your moods. Difficult...not impossible though.
As I mentioned to you before..their moods are fleeting..try to keep your mood as stable as possible. Show him what 'stable' means. Again...not easy..but possible.
