I'm so sorry you're so young and feel that things have come to this. I used to teach students your age and so many of them felt this way. I'd always do my best to offer words of comfort and encourage them to keep going. I realize it seems hypocritical because of my own views and my own desire to ctb, but it's always so sad to see those same feelings in someone so young.
I don't know your life story, and I don't want to make any assumptions or judgments. All I will say is that — as someone who first made a suicide plan at the age of 19 — even when things seem so bad, there are often so many other potential paths to a successful and happy life, or at least happy and successful years. It's unlikely that you've exhausted all your options and resources at that age. Still, I understand what it feels like to be in so much pain.
I really do hope you find peace in whatever is the best way for your situation. If you ever want to talk, feel free to reach out.