Existentialism at its best!!!! :)
In my opinon, the main reason you(me, and alot of people for that matter)are afraid of death is the fact that it's so uncertain. If you are a religious person you probably believe in an afterlife and thats fine, but even then you are not certain exactly where you will end up(hell,heaven,asgard,rencarnation?)
But think of it this way: you weren't alive before your birth were you? there is a good argument to be made that death will be similar since both are states of your non-existance, were you really afraid before your birth?
Bah, he explains it way better anyways:
https://www.youtube.com/watch?v=xNgZ2Tb2tkM
As I said, what happens when your gone is something no one really knows, so until then, try and make the best out of your life and do whatever YOU feel like doing:D
That being said I am kind of a huge coward concerning death mainly because of the uncertainty part.:lol: