by J. K. Rowling (2007).
Once upon a time there was a boy and a girl, and they were in many, many stories. They were in love, like really totally in love, but one or the other (or both) were charged with a Quest. And at the conclusion of this Quest, circumstances were such that they just couldn't be together, no matter how much love there had been.
The final book in the Harry Potter series is, thankfully, not that kind of story. It's a big story, and I could say a lot of things here about it. But the only really important thing, for me at this moment, is that it ends with love, with friendship and hope and life going on.
Of course, as another Hero once said, "The hardest thing about this world is having to live in it."