I occasionally pop into these types of threads ... as some here may know our son committed suicide at the age of 30 (6+ years ago on December 4th, 2005). And I'll say what I always say, no one has any idea why a person actually makes that final life-ending decision except for the person who kills themselves.
We can all assume, presume, speculate and imagine the reasons for each individual case, but none of us ACTUALLY know why. Just before our son put a Rugar to his chest and pulled the trigger while lying on his bed, he had been promoted to a high position at Intel, was in a loving relationship with a beautiful girl, was sharing his God-given musical abilities with impoverished inner-city youth to give them a better life, etc , etc. He, on the surface, had no reason to end his life.
It was planned and deliberate. No notes, no phone calls, but everything regarding his personal affairs was laid out in an orderly manner to make it easy for his survivors to close out his legal life.
Was he a coward? Don't know. Was he brave? Don't know. Clinically depressed? Don't know. We (his family & close friends) don't have any real idea about any of it, and we have stopped trying to figure it out. In reality, if we did somehow magically find out the real reason, would it make any difference now?
As I usually do in these threads, I caution all to be very careful about how you treat anyone who has been involved in a suicide event, be it your own or another person. Each event is unique to the situation, and while there is some commonality in suicides, no one knows the real reasons. If we did, the suicide would have been prevented.
But early recognition of the warning signs is critically important and we all need to be better informed ... there are some good links here and I'll provide another:
http://www.afsp.org/