I thought you were worried I was going to die," Sam said. "No. You'll never die. And if you ever died, I'd just start the game again," Sadie said. "S… - Gabrielle Zevin

It's easier to be happy than to be sad. Being sad takes alot of work. It's exhausting

It's more than romantic. It's better than romance. It's friendship. Sam laughed. Who cares about romance anyway?

She had once read in a book about consciousness that over the years, the human brain makes an AI version of your loved ones. The brain collects data, and within your brain, you host a virtual version of that person. Upon the person's death, your brain still believes the virtual person exists, because, in a sense, the person still does. After a while, though, the memory fades, and each year, you are left with an increasingly diminished version of the AI you had made when the person was alive.