I'll start off with one, Being upset about a breakup that happened hundreds of years ago.
Edit 1:
- Heath death of the universe, Death of the sun, etc, does not count. I feel like focusing on this is an overused point.
Edit 2:
- Loneliness does not count. I feel like we all know immortality means you'll miss people and lose them.
I wonder if it might engender an advanced sort of solipsism and callousness towards other people. After thousands of years of the world coming and going around you while you remain, would you even recognize other people as real or meaningful?