Recently, a work colleague of mine took his own life. I could not bring myself to go to his funeral. My train of thought on this subject was, and is, very complicated. I'm saddened by his departure, but extremely disappointed that he took this option when there were so many options open to him. Ultimately though, it was his choice to make, as is mine for not attending his funeral. Part of the problem with him, outwardly, he was always joking and smiling. You would never pick him as the suicidal or depressed type. Those are the people you can not do anything for, as the first symptom of their condition, in many cases, is their death.
In my job, I and my colleagues work so hard directly with suicidal and depressed people, trying to prevent them from doing the unthinkable. Mostly we are successful.