As somebody who has battled severe depression (and a number of other mental health illnesses) for the better half of his life I want to share my own opinion. Whether or not suicide is selfish, is pure opinion, not truth or fact. It should be an individual right. If you want to judge that person, go ahead and congratulations on being an asshole. You probably have no idea what they're going through. Sometimes a person is in so much mental of physical pain, and with modern medicine not being a cure all, who is anybody to say it's wrong, or immoral, or whatever bullshit adjective you might find in your dictionary. If somebody is determined to do it, they will, and if you don't like, well tough shit. Yes it's painful to those around them, but if they're finally at peace, then God speed. Those around them will mourn, yet find the strength to move on. Death comes for all of us, regardless of method.