Harry Potter Withdrawal

And this afternoon I've been a little melancholy. I couldn't quite place why, until I thought about Harry Potter and the Deathly Hallows again. And I decided, I was feeling a little sad. Not because of the way the book ended, but because it ended at all. As Ms. Rowling alluded to while she was writing, we had to say goodbye to all these characters who've been really more than just characters. After seven books--four of them quite long--they're friends now. And at the end of this book, we know we have to say goodbye to them. There will be no more Harry Potter books.

For this I'm fairly sure Ms. Rowling is glad, as after a while I think you get tired of your characters. But once they've been that much a part of your life, even if just your literary life, for so long, you know you're going to miss them.
That's one of the nice things about a book. You can always go back and read it again.