Depends on what we're calling suicidal? The first times I can remember actively seeking death as an escape I was probably 6 if I recall, but I know I had wanted to die before, and I'm not sure I actually knew that it was called suicide until around 8 plus or minus a year.
I've attempted a few times but almost always turned back, or had done it with an easy outing becuase I was, and honestly still am, scared of what death actually means, granted nowadays the thing that fears me more is how it'll affect the people that I care about and mean so much to me. I've tried hanging myself, waiting for a truck while sitting on an overpass but got too cold lmao, slitting my wrists, almost od'd, and jumping. Some i've tried a few times, but looking back on reflection I don't know how I expected some of them to work, or what I could've gotten from it, others I knew it was more for a cry for help which I never got.
I think my next attempt will be either by jumping or trying to overdoes again. My main issue is there doesn't seem to be many good places to jump from near me, and damn I'm skipping meals already because I'm so low on cash and drugs are kinda expensive. I don't know if i'm going to, but I can't get the thoughts out of my head and I feel a desperate need/want to.