Taylor Swift's friends always have her back. After news broke on Wednesday that the "Bad Blood" singer and her boyfriend, Calvin Harris, had split after 15 months of dating, the world was left slightly devastated. But while we're mourning the pair's sweet romance, Taylor's friends are doing everything they can to cheer her up. The star's childhood best friend, Abigail Anderson, who was also the subject of Taylor's song "Fifteen," took to Instagram on Wednesday to share a sweet message for her friend. "There are few things more significant or valuable than a friendship that will withstand the test of time," she wrote alongside a photo of a card that reads "My weird heart loves your weird heart." "Thank you for getting me. Always. @taylorswift." See the shout-out below, then see what other celebrity couples have called it quits this year.