What does “짝사랑” mean in Korean?

짝사랑 is the Korean word for a crush that only goes one way — you love someone, but they don’t love you back, and often don’t even know. It’s built from 짝 (“one of a pair, a match”) plus 사랑 (“love”), so it literally describes love that’s missing its other half. The opposite move is 고백하다, “to confess your feelings” — to stop pining in secret and actually say it out loud.

The whole word turns on 짝: a 짝 is one half of a matched pair (a sock, a chopstick, a partner), so 짝사랑 is “half-a-pair love” — affection with no answering side. The choice every K-drama hangs on is right here: stay in 짝사랑, or 고백하다 and risk a no. The clip frames it as exactly that fork — “do you want to confess (고백을 하고 싶어?) or stay in one-sided love (계속 짝사랑으로 남고 싶어)?” — before the confession finally comes out: “너를 많이 좋아해” (“I really like you”).