U.S. country music star Taylor Swift has broken up with Conor Kennedy after dating the high school senior several months, UsMagazine.com reported Thursday. \"They quietly parted ways a while ago,\" a friend told the magazine. \"It was just a distance thing. No hard feelings. They\'re fine.\" Swift, 22, began dating Kennedy, the 18-year-old grandson of late Sen. Robert F. Kennedy, in July. The singer is now on the promotional trail for her new album, \"Red.\"