The website declared the couple are "living together and talking about getting engaged one day" in the headline, and quoted a source who said the pair's ability to make things work despite their "huge demanding schedules" has "cemented their commitment to one another."
Swift and Harris did spend their first Christmas together over the holidays, along with the Swift's family. The singer delighted fans by sharing a photo of the snowman she and Harris built with her younger brother, Austin Swift, on Dec. 23.
The high-profile couple have been linked since spring 2015, and dismissed engagement rumors in September. Harris previously said the relationship is "going absolutely fantastic," telling KIIS FM he's "insanely happy" with Swift.
Swift last released 1989 in October 2014, and brought her accompanying tour to a close Dec. 12. The album includes the single "Out of the Woods," for which the singer debuted a music video for on Dick Clark's New Year's Rockin' Eve on Dec. 31.