From the album Promise? - Single
This song pretends to be about keeping a secret but spills everything anyway. The narrator asks for an impossible escape clause, a promise they can take back the confession if it goes wrong, which means they already know they're not ready to risk it. The whole frame of 'I'll never tell you' collapses under the weight of how much specific, obsessive detail she gives away.
I should probably just leave it alone / 'Cause I know that we're supposed to be friends / We're friends, we're friends, we're friends, but
The triple repetition doesn't sound like convincing herself. It sounds like trying to talk herself down from a panic spiral, which means the friendship label is already failing to contain what she feels.
Do you know how it feels, pretend it's no big deal? / When I'm looking up at you I make you laugh
The height difference detail, 'looking up at you', is so specific it gives the whole game away. She notices his crooked grin, his hair in his eyes, the exact physical geography of standing near him. This level of attention means she's already told him without saying a word.
You're in the rain, you're in my drink, you're in my cortisol
Cortisol is the stress hormone. She's not romanticizing the crush, she's naming the physiological cost of hiding it. The longing has become a medical condition. That line might be the most honest thing she's written.
So if I tell you, then promise me I can take it back
The song ends exactly where it started, no resolution. She asks for the same impossible promise twice. The repetition isn't emphasis, it's paralysis. She knows the promise wouldn't mean anything even if he gave it, which is why she'll keep asking instead of confessing.
The song's central irony is that it's a confession disguised as silence. She lists everything she wishes she could say in a bridge that exists inside a song called 'Promise?', which means she's already said it, just not to his face. The question mark in the title does the real work. It's not asking if he promises. It's asking if any promise could actually protect her from this.