I am sorry about the loss of your friend.
It seems wrong that humans, with all our potential, are such temporary beings, but all the evidence points to that conclusion.
Before we were conceived we simply did not exist. For far too few years we consume vast amounts of energy to defy entropy and experience the sensations of being alive. When our bodies can no longer sustain the process that is life we dissolve and cease to exist once more. There is no "ghost in the machine".
Our atoms return to the environment to be recycled and the energy that our metabolism had stored dissipates like a breath on a misty morning.
I am sure death is nothing to fear, but I am eqaully sure we should resist it until the end. This is the only life we have, it is not a rehearsal and death is not "a gift".
Do not go gentle into that good night,
Old age should burn and rave at close of day;
Rage, rage against the dying of the light.
Dylan Thomas