My mother died 16 years ago, and my dad before her, as did all my aunts and uncles, grandparents, a baby nephew, some friends and a bunch of pets. I never married or had kids so am basically alone in the world, but amazingly I'm not downhearted because I regard them as all being back there in the pages of history,
safe and secure.
My Christian outlook might have something to do with it too, summed up by this verse-
"Don't grieve for those asleep, for they sleep in Jesus" (1 Thess 4:13/14)
Or as the saying goes, R.I.P..