Bittersweet ending. :( Thoughts?

[Bella]

Becky wrote: "It was beyond bittersweet. I wascrying my eyes out during the last few chapters of the book. I loved the book beyond words, but the ending made me really sad. Luce had just got her wings back, real..."

I can relate. When I finished the book I cried for so long. I couldn't believe that after everything Luce and Daniel went through, they would just forget each other.