According to Us Weekly, the 23-year-old country music star is "disgusted" that Gomez has gotten back together with Bieber. What's more, Swift allegedly believes that her friend used her brief romance with mutual friend Ed Sheeran to make Bieber jealous.
"After Selena pulled that move, Taylor started distancing herself," a source told Us Weekly.
The Canadian pop-star and the former Disney star seemed to have kissed and made up since their breakup last summer as the two were seen "locked in a full-on makeout session" in several public venues in Texas over the weekend.
2014: The Year in Music [PHOTOS]