Who?
is he
From the idiotic title, I was thinking more along the lines of “what?”
Ditto. He must have been so miserable that he felt he needed to end his life, and leave all his friends and family miserable in his place. They'll more than likely feel guilty the rest of their lives, wondering why they didn't see this coming, or that they might have been able to stop it. People who commit suicide are selfish, and have no idea what they do to the people they leave behind.