I've definitely not lost my touch. My writing ability is still there. In fact. I'd argue that it never left me. What I've lost though, to me, is something even more important. I've lost the passion. I've lost the spirit. I can continue to write but there's really no point to it if I'm doing it for the sake of completing the story.
My characters reflect my thoughts and small parts of the ideal story that I envision. I hold them dear. Rather than disrespect this story by continuing it with my current state of mind, I'd rather leave it as it is. The continuation of the story may never come, as much as I want it to. Will I return again? I don't know myself.
Maybe two or three years from now when I'm no longer driven by my book's popularity and the number of reads it attracts, when my love for writing comes from the process itself... Maybe then I'll return. I don't know. I really don't.