See life doesn't really have an ending, sure you die but the memory of your life lives on. Whether it be the moments you spent with your friends and the memories you share, the one's they will forever hold onto, your family, who have to love you no matter what, or by people's lives you effected in one way or another.
It's like the ending of a book. Books endings aren't really endings either, they are just when the paper stopped printing, you still use your imagination to make up what's going to happen next. What's going to happen to the characters you have learned to love? That's all up to you, whatever your mind decides on.
So don't spend your life 'existing' go out there and live your life, actually live it to it's fullest. Don't be afraid of death, don't be worried about your life ending too soon, see death as a challenge, face it head on. Challenge yourself to do as much stuff, no matter how simple or strange, before death comes upon you. Make those people you have met along to road remember you for what you were, what you will forever be, not for what you could have been.