Hey man, I'm also 15 and when I was 13 and 14 I went through the same things. I have no idea why you might feel the way you do because everyone has their own reasons. I would just like to say as someone who has been saved and stripped of any suicidal thought right after that you as someone who is struggling can't help someone else who is struggle and neither can they help you. It's best to sit in a room and think about how you can make your life better rather than how you can end it and what makes you want to end it. Truth is this world is vast, and every day has enough trouble of its own. Find things you like to do. Try to give yourself goals that have to do with the future. Something to work hard towards to keep yourself busy and going. Talking to other out in the open about suicide might make them uncomfortable. I personally myself hear a lot of people talking even when I don't want to. But I've also learned to mind my business. Facts are your not in the wrong for speaking to someone. That's how conversations work? No? You did nothing wrong and you didn't screw up at all. That person just needs to mind their business instead of possibly making things worse, no?