I DON'T OWN TWILIGHT
Eternity. It is a concept that no human can fully understand.
One human, an author named Lois Duncan has it pretty close. In one of her books, she wrote, "If there was a mountain a mile high made of granite and once every thousand years a great immortal bird brushed its feathers against the top of the mountain, by the time the bird eroded the mountain away, not even a fraction of a second would have passed in the eyes of eternity."
Eternity is forever, and living for an eternity...
If you ask many humans, most would jump at the chance of immortality; to never grow old, never have to face death. But they wouldn't understand what they would be asking for.
Most would be miserable. They'd never age and everyone around them would die and they'd just have to watch. Life is great and life is good, but eventually, you start to see all of the bad things instead of the good things that life has in store.
It is true that some could remain happy and keep an optimistic attitude. My family for example. Jasper and Alice are happy together, as are Carlisle and Esme, Emmett and Rosalie.
I suppose the trick to leading a happy never-ending life is having something to live for. My family found it in their mates.
I long for what they have. Not for a mate to hold in my arms, for I don't believe that there's someone out there for me, but just something to live for.