It seems as though Kendall Jenner might have found herself in the middle of a love triangle here. Rumor has it that she might be the reason why Justin Bieber is no longer with singer and long-time girlfriend Selena Gomez.

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According to Radar Online on Monday, even though Jenner and Bieber have never had a "fling" between them, their relationship is the reason why things have gone sour between the chart topper and Gomez.

A source tells the site, "Despite the fact that people assume Justin and Kendall have hooked up, they have not. They are legit best friends and Selena knows this. Selena initially thought that they were having an affair and told Justin to stay away from her. She eventually realized that was not going to happen though."

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Still, it doesn't seem as though Gomez can trust Bieber, and that is why she decided to pull the plug on their relationship.

The insider added, "Everyone is really sick of hearing the same old story with Selena and Justin. She gets back with him, he lies, he gets caught, she gets upset and then tries to make him jealous. She really needs to let it go."

What's more, Jenner herself feels "caught" between Bieber and Gomez. The source added that "everyone who knows Kendall well knows that it really bothers her."

Bieber and Gomez have been dating on-and-off for several years, while Jenner hasn't had a steady relationship in the public just yet. The reality star is said to be concentrating on her modeling career.

Tags: Kendall Jenner Justin Bieber