Taylor Swift Angry At Selena Gomez For Dating Justin Bieber Again, Ditching Niall Horan

Though they're still best friends in the public eye, it looks like there's a serious rift slowly tearing Taylor Swift and Selena Gomez apart. That rift, of course, is Justin Bieber and Selena is apparently back with the "All That Matters" pop song singer. Taylor is not too happy about that.

"Taylor and Selena are still friends even though she went back to Justin," an insider said, according to gossip website HollywoodLife.com. "But Taylor has set some boundaries which include no talking about Justin."

It looks like Taylor's boundaries could be good for Selena in the long run considering her recent struggles with depression. Though Taylor doesn't support her relationship with Justin, she wants Selena to be happy and thinks she knows how to help with that.

"Taylor really cares about Sel but she doesn't want to be an enabler when it comes to Justin," the source added. "Taylor has spent countless hours giving her support and advice but that's it. She will always be there for Sel but isn't giving any more advice on the matter. If Selena has any issues, Taylor suggested that she speak with a therapist because she doesn't want to get in the middle of it."

Meanwhile, we wonder what will happen if Justin and Selena break up again, as they did many times before. What will Taylor think then?

"Selena obviously feels that Justin is more important to her than Taylor, and Taylor is fine with not being friends with Selena," another insider speculated last week. "She tried to help out, it didn't work and now she is waiting to tell Selena when Justin breaks her heart again that 'I told you so!'"