Fear of losing my pare ts

I am 19 rn my parents are in their 60s im afraid of losing them as im an only child. I love them alot it scares me to lose them idk what id do without damn i grew up pampered and very close to them to the point i never learnt independence as where i live children moving out at 18 isnt a thing. I wanna know how to deal with this unpleasant feeling I fear that losing my parents is going to mentally break me because even thinking about it makes me feel like life is just not worth living, im not the type of person to socialise so i have a very small circle but idk if there’s anything i can do to get rid of these thoughts i try to live in the present but am failing to do s o