I have Bi-polar among other neurological disorders, so I get suicidal every once in a while.
What's worth knowing is that I have never attempted suicide, ever.
The reason is that I know there will always be a place for me in this life that only I can fulfill.
The way I change that place for me in this lifetime is by raising my own level of living to a state where my role is that of a higher character than before.
Remember the ultimate quality in a play: character development.
If you live your life and never try to improve or break out of your shell, guess what? you're a boring character!
What I've also found is that you need to always think of what you hope for in life, and remember that it is going to happen if you stick to your life, but it is not going to happen if you don't.
That's not a guarantee, but rather a matter of possibility. If you have given up without killing yourself, you've still given up, and you are led by despair into desperate situations, rather than by hope towards inspiring situations.
Read my thread "The Trinity (no, not that one...)" and you'll understand how it is that changing myself will change the world.
And always remember this quote:
"Be the change you want to see in the world"