Stopping From Reality

Stooping as low as to try to kill himself, he was forced to deal with his dilemma, Connor.

Edward isn't suicidal, he has those thoughts now and then but doesn't act on them.
He ends up trying to off himself and now has to deal with the after-effects, people actually listening to him and Connor trying to make it right.

But why is it that when people commit suicide, people actually change?