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.
Having to keep creating fake identities to prevent people and governments from finding out that you're immortal. That would be a massive pain in the butt, especially in a world where mass surveillance of the population is common.
Unless you have a lot of money to rely on I don't even know if it's reliably possible right now. You're basically in the same situation as an undocumented immigrant.
And the more times you do it, it's like playing a Russian roulette over and over again, you'll eventually be caught.