how can u make death NOT freak u out??

i was with my friends yesterday and death had became a topic of discussion, and i personally do not have a good relationship with the thought.

i have this huge fear of amounting to nothing, so of course im trying to follow the whole "make the most of life" "enjoy every day like its your last" but it doesnt sit well that we just, stop existing.

now im not religious. i find no interest in it, i dont care for it and would even go to say that im an atheist.. ive tried believing but it is impossible for me, im too invested in science lol; but i wont lie - it does make me jealous about how comforting it must be to have the ability to believe in living on after this life and how okay it must make you with death because you think something is waiting for you after. i sit and think about how one day i will be nothing and everything else will continue like normal and i wont see it. it is a sickening thought.

all of my personal memories will no longer be there to look back on. i cant exactly put this feeling it gives me into words besides simply saying fear but its more than that. it is a genuine feeling that i visualize for a moment, i get it and then i lose it because i cant handle it. its something i feel i dont know how to describe the feeling of being aware that i will no longer exist someday and i am seeing all this now and one day it will stop and i wont know. everything im experiencing everyday is temporary. death HAS to happen the clock is ticking nonstop we are on a timer. its terrifying.

we have so many physical possessions, in all the only thing we genuinely have is life. you can lose and regain possessions but life is the one thing you have that you cannot lose or you become nothing.

people are so okay with the thought, maybe its because im 16 and i havent lived my life to its full potential yet but i dont know how to ever be okay with it