Stand:
I spent a thousand years in exchange for one gaze from you in this life. Why are your eyes full of sadness?
I spent a thousand years in exchange for this life to be by your side. Why are you hesitating next to me?
I spent a thousand years in exchange for never forgetting you, but you have already forgotten my appearance!
No:
My eyes/are so sad, just because/you will eventually forget me
My figure/is so hesitant, just because/she is already by your side
My heart/is so desperate, just because/I want to forget but cannot forget