Changeling.

I'll try to appreciate my life until it's no longer my life.

I feel like a changeling, like someone made a terrible exchange. And eventually, I'll shed this life, this body, and rise as one bright white as light. I'll travel as the otherworld, and my other can return to pick up her, our, life again. She may be a better mother, wife, daughter and sister than I. She will belong, perhaps, in ways I never have.