I love you dearly, but I must go.

Hi baby!
He plants a kiss on my cheek.
I love you, I brought you something from downstairs.
He moves his hand around from behind him, a dark blue rectangular book in his hand with a large circular moon on the cover. My favorite children's book.
You're smiling! I knew I got the right one! Want me to read it to you?
Of course I did, I nodded, he smiles in return.
Here we go, your favorite page.
My heart dropped for some reason I couldn't think of. Dread filled my chest and my eyes widened.
Meet me at the moon, my beloved, for I will be waiting.
What— what's happening?
I'm sorry, my love. I have to go.
No, wait— PLEASE