Taylor Swift has a lot to thank Harry Styles for. For one, this song, (check out a preview of it after the jump). And second: giving her some life experiences. She reveals on GMA the real inspiration behind the song.

The reason: the frantic feeling of questioning and anxiety she felt in a relationship.

Translation: Taylor doesn't like taking it easy, she likes things serious!

“This song is about the fragility and kind of breakable nature of some relationships. This was a relationship where I was kind of living day to day wondering where it was going, if it was gonna go anywhere, if it was gonna end the next day.”

Check out  a preview of the song:

And check out the interview below:

Was Taylor actually being insecure? What do you think?