Taylor Swift felt anxious throughout her relationship with Harry Styles.

Taylor Swift and ex-boyfriend Harry Styles

Taylor Swift and ex-boyfriend Harry Styles

The 'Bad Blood' hitmaker, who split from the One Direction heartthrob in early 2013 after three months of dating, never really felt like their romance would last because they were constantly facing obstacles.

Before performing an acoustic version of her track 'Out of the Woods,' which is believed to be about her British ex-boyfriend, the 25-year-old singer said: "The number one feeling I felt in the whole relationship was anxiety. Because it felt very fragile, it felt very tentative. And it always felt like, 'Okay, what's the next road block? What's the next thing that's gonna 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?' "

But Taylor, who is now dating Scottish DJ Calvin Harris, insists their short-lived relationship, which also inspired several other tracks on her most recent album '1989,' still meant a lot to her.

In a new video released by the Grammy Museum to celebrate the record's one year anniversary, she added: "I think a lot of relationships can be very solid and that's kind of what you hope for, for it to be solid and healthy but that's not always what you get. And 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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