Love.

"There will be memories everywhere you look, everywhere you go, you´ll find them where you least expect, even in places where there should be none at all," he paused, closing his eyes for a moment. "Because one day you will look at the ocean and you will remember simply because I could never show it to you. And it will hurt, more than you imagine possible. So don´t just… stand there and try to convince me of how easily you and I can forget. Because I know you can´t. You won't."