As an English teacher, it is hard to find good literature without a dark side: Romeo and Juliet -- suicide, Lord of the Flies -- murder, Hamlet -- murder, even The Great Gatsby has murder. I really try to make sure we read great literature, but the human condition is not happiness and light. I try and balance deep literature with other positive things. 

Unfortunately, social media, literature, etc is not the cause of teen suicide. It is an amalgamation of many things. Kids today are under an extreme amount of stress and expectations. Look at what they are told matters: grades, sports, personality, clothes, activities -- everything can ruin your chances at college, and college is the only way you have a chance at being successful. Everything in our world has become 110% all the time. Kids need a chance to goof off, try things without fear of failure, they need to have adults who see them as people, they need to have more positive connections.