Swift says the song is about a relationship where all she felt was anxiety.

Taylor Swift Performs "Out Of The Woods" At Grammy Museum

Calvin Harris might shy away from this one.

To celebrate the one-year anniversary of Taylor Swift’s 1989 record, the Grammy Museum shared an intimate performance from Swift in the Clive Davis Theater on Sep. 30.

During a sit-down interview affront an audience at a very exclusive event, Swift detailed how much of the album came to be, including “Blank Space,” “I Know Places,” “Shake It Off” and “Out Of The Woods.” She performed a stripped down, piano-backed version of the latter that day.

Ahead of the somber rendition, she described the song many believe to be about ex-boyfriend Harry Styles.

“I’m going to play you a song about a relationship that I was in that… the number one feeling I felt in the whole relationship was anxiety. Because it felt very fragile. It felt very tentative. It always felt like what’ the next roadblock? What’s the next thing that’s going to deter this? How long do we have before this turns into just an awful mess and we break up. Is it a month? Is it three days?”

She adds, “I think a lot of relationships can be very solid and that’s kind of what you hope for. Solid and healthy… but that’s not always what you get. It doesn’t mean that it’s not special and extraordinary just to have a relationship that’s fragile and somehow meaningful in that fragility.”

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During her sit-down interview we mentioned, Swift said of the Jack Antonoff collaboration, “The song itself, it just kind of conjured up all these feelings of anxiety I had in a relationship where everybody was watching, everybody was commenting on it. You’re constantly just feeling like, ‘Are we out of the woods yet? What’s the next thing gonna be? What’s the next hurdle we’re gonna have to jump over? Are we gonna make it to next week? It was interesting to write about a relationship where you’re just honestly like, ‘This is probably not gonna last, but how long is it gonna last?’ Those fragile relationships…It doesn’t mean they’re not supposed to happen. The whole time we were having happy memories or crazy memories or ridiculously anxious times, in my head it was just like, ‘Are we OK yet? Are we there yet? Are we out of this yet?’”