So you were one of probably many people who ignored and dismissed this poor guy and now you wish he would have sought help and not killed himself? Just so he could go back to being treated like a house plant? Why waste the time, is probably what he figured.
Do not wait until someone is dead to give them an eulogy. Kind of a bit late, don't you think. I remember when a group of kids died in a car accident back in HS. Everyone was wearing arm bands with their names for weeks after. Arm bands? To have stopped them from getting into a car while drunk and stoned, regardless of how uncool it made you look, would have been a true gesture that you cared. But arm bands are just pointless symbols best left to the symbol-minded.