I can tell you all about a personal experience!!!
I had Both of my Uncles committ Suicide by the time they were 30!!!
I also had a bad part of my life when I atteptempted it both in 1987 and 2002. I have since been MARRIED, and very happy.
But I also live on Anti-Dpressants for the rest of my life!!! Which I am thankful for, but, what most people don't realize is that it is hereditary, not just just voluntary!!!!