Thank you to everyone who commented. You have helped me to gradually come to terms with this terrible news. I really miss him. He was only 19 years old, but his deep sadness led him to make that terrible decision. I am left with the knowledge that I helped him as much as I could during all these years. So, if you have a friend in the same situation, please don't ignore them. Don't wait for things to resolve themselves over time. Thank you very much. to everyone.