> Also, depression never leaves you alone, so there will be multiple points in your life where you will think about taking your own life, and you will yourself doubt whether you will go through with it up to the point of pulling the trigger, so you don't want to tell someone and "waste their time" if you are not sure you are going to do it.
This is not true, though I agree that this is how the afflicted might see it.
I've had depression and suicidal thoughts. Now I don't. A combination of ambition, temporary setbacks, and treatable medical problems / drug interactions were at fault.
Now I don't feel suicidal. I sometimes feel sad, but never depressed. If anything -- the few bouts of depression I had were something like a crucible. I've looked into the abyss, broken down, and now I know that I can put myself back together again. It's actually kind of liberating and focusing.
There is hope!