I think that too many people tend to concentrate on fear as a root cause of suicide. Anger is another biggie. Someone can get so 'mad at the world', that there is just no possibility to vent it all in socially acceptable ways. Understand, please, that suicidal people are not thinking in ways that most of us would understand. The process goes something like this:

"I am really, really, angry at you, because _______, but I can't allow myself to hurt you, which makes me angry at myself, plus I am angry at you for causing me this much anger, which makes me even angrier at myself for not living up to my own expectations, therefore I will hurt myself."

Sensible?? No. Frightened?? No. Self-destructive? Oh, yeah.