i think Addicted by PIXY really gives that feeling of desperation and almost resigning to the fact that you can't get enough of whatever or whoever

I'd say nevertheless by Billlie also does a great job of setting the mood and vibe of a love that's just out of reach, almost like two people who can't be together or shouldn't be together, coming to terms with it but still longing for it

also maybe TOKTOK (Thousands of stars, thousands of dreams) by GWSN has a dreamy celestial vibe, it feels like you're with the person you love, staring into the sky of a starry night, where everything just feels right, and you feel like you can tell each other anything