I think this song is about a girl who likes someone who likes another girl, the Lucy of this song. And she's close friends with both Lucy & the guy & it hurts her to see the guy that she likes starting into the Lucy of the song. (as in Lucy's satisfied knowing that nothing's gonna make her happy & the guy started becoming unhappy because he just cant get Lucy's attention no matter how hard he tried).
I think this song is about a girl who likes someone who likes another girl, the Lucy of this song. And she's close friends with both Lucy & the guy & it hurts her to see the guy that she likes starting into the Lucy of the song. (as in Lucy's satisfied knowing that nothing's gonna make her happy & the guy started becoming unhappy because he just cant get Lucy's attention no matter how hard he tried).