It's so sad, and sometimes you never completely know why they did such a thing. Many people just feel overwhelmed and that life is just no longer worth living.

Depression is a horrible thing to deal with. While I've felt depressed as all get out myself, I really haven't ever come to the the "life is not worth living" idea. I know that if I did that, it would destroy my mother and father, and I would never want to hurt them in a million years (no matter how much we argue, lol).

I hope that your friend will find solace in friends and family and will be able to find some answers as to why her husband just lost faith in life.