At 2:18, when he says “Save your tears for another”, in the first part of the song, the chorus starts right after this but at this part he says another line “I realize that I am much too late blah blah”

That whole part where with the two added lines before the chorus is so goat I can’t even explain why but it is

Playing with your expectations! He knows you’re expecting the chorus so he switches it up and lengthens it a bit. It’s called a deceptive cadence in formal terms

It’s flames bro, thanks for the knowledge

that's the textbook good pop hook switch-up.

Favorite part of the song

Even in the video when he’s dancing with the girl and he smiles as he sings it makes it better

That’s exactly how I pictured it tbh