누굴 이렇게 좋아해 봤어?

The line, explained

This is a chorus line that sounds like a dare. The singer turns to the listener, or to the camera, and asks: have you ever liked someone this much? It is cheeky, a little vulnerable, and built on an ending that intermediate learners meet early but rarely use in such an emotional way. -아/어 봤어? is usually about kimchi and travel. Here it is about falling hard for someone and wanting to know if anyone else ever has.

누굴 is a squeezed form of 누구를. 누구 means who, and in a statement or an open question like this it slides toward 'someone' or 'anyone'. 를 is the object marker, and in speech and song it often collapses onto the word before it, so 누구를 becomes 누굴. You will see the same squeeze in 널 (너를) and 날 (나를). Spoken Korean saves syllables wherever it can, and lyrics, which live on the beat, follow that habit everywhere.

이렇게 means like this, this way, or this much. It comes from 이렇다, to be like this, and it points at whatever the speaker is doing or feeling right now. In 누굴 이렇게 좋아해 봤어? it means the amount: have you ever liked anyone to this degree? There is no 'much' word anywhere in the line; the intensity lives entirely in 이렇게 and the singer's tone, and Korean listeners hear it instantly.

좋아해 봤어? carries the grammar. 좋아하다 is to like. Attach -아/어 보다 and you get 좋아해 보다, literally 'try liking', and in the past tense 좋아해 봤어 becomes 'have you ever liked'. The pattern asks about experience: 김치 먹어 봤어? have you tried kimchi; 서울 가 봤어? have you been to Seoul. 하다 verbs become 해 봤어, verbs with 아 or 오 vowels take 아 봤어 (가 봤어), everything else takes 어 봤어 (먹어 봤어).

The whole line is also a quiet confession. You cannot ask someone whether they have ever liked anyone this much without admitting that you have, right now, in front of them. Answering is simple: 봤어 or 응, 해 봤어 for yes, 아니, 안 해 봤어 for never. Say the question with a little rise on bwa-sseo and let it hang in the air. The best K-pop hooks leave room for the listener to answer back.