Legalize Suicide and provide a relatively pain-free option for those who are considering suicide. It is not up to you or anyone else to determine whether or not someone should live or be allowed to end their life - it is up to the individual.
Suicide is NOT selfish.
Forcing someone to stay alive is selfish.
Forcing someone to take drugs that they do not want is selfish.
Forcing someone to stay in a hospital against their will is selfish.
Forcing someone to be a laboratory rat for science is selfish.
Demanding someone to stay alive for (get this) your own selfish reasons are (you guessed it) selfish.
People attempt suicide all the time. Perhaps it is time to actually listen to them and help rather than make their lives more miserable because some asshole does not agree.