Why does life have to be unfair?

I don't get it. Why do people that want to die and kill themselves get to live life healthy but people that do want to life get horrible diseases. Yes, i know people that kill themselves have mental issues but why is life unfair to those who do want to live. I have learned now that i want to live my life my way, your input will matter but it is up to me. I am not going stop at something and i am not going to slow down. I now know life is important and short. Tonight, think, which is kind of hard for me about these subjects because when i get an answer i can't remember and don't usually get time to write it down. So what i need is time and so do those people that want to live.
~kass