Point out your fears, don't hide and live with them.
Over 6 years ago I had a bad pulmonary injury that took me in ICU for 2 weeks. It happended suddenly, I walked up a morning, brushed my teeth, went to work and at 11am I collapsed. I have been through mental and physical pains that no one can ever understand unless you go through it.
This experience prepared me pretty well to death. As I was dying the magical pass out scared me less and less. Living my fear made me understand what it is and how it feels. My body and my mind had no time to fear anyway as I had to action. The unkown scares, humanly, but as you forced yourself (or are forced) to confront reality, you soon become fearless.
Naturally young ages are too early to go but I have faith in life and where it takes you. No matter what.
I know this is quiet of a long process of acceptation.
I remember that one time, a couple months after I got off hospital, a routine doctor check up, they said you are fine now, you can live again, exercise, work. I called my mom straight after crying because that news broke my heart. I am alive ? All that pain and getting ready for the after. And now what ? Ticket has expired ? Life's playing with my nerves ! I was litteraly dissapointed, a wreck and mad. How sad when you think about it.
Years after, I finally accepted the good in doctors news. I am alive. breathing, talking, loving. Tip is that without really realizing I had accept to live and to die.
I would end up on to focus on what you have and do not make up fears that should not be yours. Know that only time will help to accept failures or hard realiity. "Life" will always get better. I swear.