Saving people is a really hard task - it won't always work. But what you can do is love them, make them feel special and let them know there's someone who cares about them and that their life is worth living.
For he chose us in him before the creation of the world to be holy and blamelessin his sight. In love he predestined us to be adopted as his sons through Jesus Christ, in accordance with his pleasure and will. - Ephesians 1:4-5