some times people relize that it is time to go and dont want to fight any longer i fear death because all the loved ones i will leave behind but what can we do we all meet our maker some day medicine and treament only slow it down for so long it is sad and heart breaking be there for your friend who knows he might change his mind but in the end it is up to him yeah his decision will affect others but only he will know if the decison was right good luck to you and best of prayers to your friend