Shock and disappointed

Today, i was shock. My friend told me that he got liver cancer and just can live for half year only. After he told my he didn't reply me again. He is a very nice person, he treat me very good even we didn't meet before. When i heard what he told me, i felt this world is unfair. Why such a nice person die in young age??? Why the bad guy can live for long time??? I wish, and i only wish for now is i want him to be healthy again. He is a special person for me.