I was about 12 I think when I just saw nothing in my future.
Started really thinking about suicide when I was 17 probably, and it's never left! I am 33 now! Felt like something would happen to me to cut my life short in the future, or that I would take my own life. This is partly why I never had the motivation etc in life that others had, and why I lived a certain way! I never realised back then how difficult it might be to actually commit suicide. A lot more difficult than the films show!
When I was 17, it was more like I was thinking ' yes at some point I will do it in the future'. Now it's more like ' I have to do this now!'
It consumes me now!