Im 29, and had my first suicidal urge at 8 yrs old.
A car drove past me, and something inside told me I should step in front of it. It wasnt a voice, but it wasn't my own thoughts either. I wasn't depressed, sad, or even upset. I was scared after, and told my mother. She made a big deal, got me seeing Drs, and then once no one was around to give her attention at home, she didnt care. My depression only mattered in public.
Everything after has been my own decisions, or desires (save 2 psychotic episodes from alcohol od, and then paid drug trials).