Disclaimer: did a pretty bad job explaining the lyrics....I didn't really get it myself!
Some links to help you out:
1. Seems like ~ㄹ 것 같다: • Korean Grammar in One Minute - It seems li...
2. Direct Object Particle ~을/를: • Korean Grammar in One Minute - Direct Obje...
3. But ~지만: • Korean Grammar In One Minute - But (V/Adj/...
4. If - V + 다면 • Korean Grammar in One Minute - If #2 (-ㄴ/...
5. Past Tense V + 었/았: • Korean Grammar in One Minute - #2 Polite P...
6. Adjectives ~ㄴ/은: • Korean Grammar in One Minute - Adjectives #2
7. Location particle ~에: • Korean Grammar in One Minute - Location Pa...
8. According to ~대로: • Korean Grammar in One Minute - According t...
9. Want to ~고 싶다: • Korean Grammar in One Minute - Want to (-고싶다)