Missing You is a love poem written after a relationship has ended, or at least after the two people have been separated. The speaker opens with a playful twist on Hamlet's famous line, asking whether to miss someone or not. But the joke doesn't last. The speaker admits there is no real choice, because the missing happens every day and every night.
Most of the poem is a list, with nearly every line beginning "I miss." The speaker recalls small, specific things: a laugh, the sparkle in her eyes around her cats, her passion for art, her sarcasm, her "adorkableness." Then come the bigger things, like hugs that make the world melt away, late-night talks, and feeling safe. The repetition feels like someone who can't stop thinking about the person they love.
The mood is tender, sad, and sincere. The ending, with "To the moon and back" trailing into ellipses, leaves the feeling unresolved and quietly aching.