Ah, no, I don't think it's "about a girl in love with another guy but hes got a gf and she wants to tell him she loves him but she can't".
Rather, it's just about a girl who's in love with a guy.
[She can't tell me that all of the love songs have been written, 'cause she's never been in love with you before.] The 'she' here refers to a random singer/lyricist/person. The song is saying that this random 'she' cannot say all that because 'she' has never felt how it feels to be in love with THIS guy.
[I'm trying to keep cool, but everyone here likes you
I'm not the only one.] This line, I think, talks about this singer introducing the guy she loves to her friends, and she's relieved that everyone, not only she, likes him.
[I want to kiss the back of your neck,
the top of your spine where your hair hits,
and gnaw on your fingertips and fall asleep,
I'll talk you to sleep.]
Ah, no, I don't think it's "about a girl in love with another guy but hes got a gf and she wants to tell him she loves him but she can't".
Rather, it's just about a girl who's in love with a guy.
[She can't tell me that all of the love songs have been written, 'cause she's never been in love with you before.] The 'she' here refers to a random singer/lyricist/person. The song is saying that this random 'she' cannot say all that because 'she' has never felt how it feels to be in love with THIS guy.
[I'm trying to keep cool, but everyone here likes you I'm not the only one.] This line, I think, talks about this singer introducing the guy she loves to her friends, and she's relieved that everyone, not only she, likes him.
[I want to kiss the back of your neck, the top of your spine where your hair hits, and gnaw on your fingertips and fall asleep, I'll talk you to sleep.]
But yes, I love the details in this song!