Everyone has had friends and relatives commit suicide, your example is unfortunately far from unique. This is the time of year we start thinking about all the friends and loved ones we have lost over the years. It sucks, it really does. I cry and puke over the friends I have lost through suicide every time the holidays roll around. I too get angry at the selfish choices my friends have made. That's the way life is. It sucks and it hurts. But we all have to get over it and hopefully learn from it.
Bonus points for the obscure M*A*S*H reference.