Who am I without you?

"I wish she was here standing next to me, holding my hand in hers and warming my wounded soul with her astounding smile that makes me feel like the happiest person ever. But she's gone. She protected Collector from Belos controlling the huge titan's body and trying to kill this naive "star"-boy... But who will protect me? Who will fill this hole in my heart left after the Luz's death? How can I live, no, be without her?.."

From the author: I cried as that moment happened... Even though in the original story everything got great I want to create a new storyline. What if Luz didn't come back from the dead? To be more concrete, what will Amity feel after they defeat the ex-emperor and continue living not having Luz anymore?