That's what I always thought :( So why are so many people complaining about Tauriel/Kili and that it wasn't in the books. It's been the same with Aragorn and Arwen, but both stories became something great :
I think the hobbits are Tolkien’s most wonderful creation. The adventures of the hobbits were beautiful creations. These small, kind, adventurous beings and their stories touched my heart more than any other story.