Suicide is painless? No.

My most recent chapter ("Take Me") of my story MSR has our girl so lost that she begs Rosalie to 'take her,' that is: to kill her by exsanguination, because her life is now at its lowest and has no prospects to get better. Rosalie disagrees.

It is just so, so hard, being in the position where a person thinks they have no out and things can only get worse from here ... and that nobody loves them ... and that nobody cares ... and that by committing suicide, people will actually be happier that they are gone ... because (and this has happened) somebody told them they should just kill themselves.

I'm no expert in suicide prevention, but: a couple of things.

Helen DeWitt in her novel Last Samurai offered the suicide's alternative (that actually came from Jonathan Glover, the Utilitarian) which is "before committing suicide you should change your job, leave your wife, leave the country" (ibid, p 490)

The other thing is this: you think your help others by offing yourself.  You think you're terrible.  You're not, and you're not.  The webcomic "Questionable Content" shows a daddy's little girl, the happiest child in the world, very, very damaged because she went out back one day, looking for Pa, only to see Pa put a gun to his head.  A happy man, a kind man, a good family man, a man with no secrets, but then this.  And she's been paying for it every day since.  Don't make them the excuse for your death, make them the reason to keep living one more day.

Because they need you and they love you, and they will miss you when you are gone. 

Even 18 years later. As I do.

As I state in my story, there is a special place in Hell for suicides, and you may or may not end up there, but one thing that will happen is that people who know you and love you will carry that little burden in their hearts for the rest of their lives and perhaps unto Eternity.

But you think you have to face this alone. You don't.  Your friends and family will listen.  If they won't, then there's a hotline.  And, if that doesn't work, then, please, do something, even the Glover alternative.  Why kill yourself if all you've seen of the world is the one little country in which you grew up?  Get a ticket to ride on a tall ship and go up into the crow's nest, it will (literally) lift your heart, and the price of the ticket is so much less than the price of your life.  It is.  Really.