It has recently been reported that Kendall Jenner simply cannot stop thinking about Harry Styles, who she dated briefly, while the One Direction singer is no longer interested in her.

According to RadarOnline, the 18-year-old reality star "just can't get him out of her head" and has not stopped calling the 20-year-old British pop star, "despite their romance fizzling out months ago."

"Now Kendall desperately wants him back. She loved the attention dating Harry gave her, plus she really fell for him big time," a source said. "Kendall really opened up to him and he did nothing but use her. That hasn't stopped her from dreaming of a rematch and after a night out with the girls, she'll come home and start calling him."

On the other hand, Styles does not feel the same way about her, as he pretty much ignores Jenner's calls. "Harry rarely takes her calls because he knows when he's pushed his luck when it comes to a woman's heart and Kendall's got it bad for him," the source said. "He doesn't want to encourage her, but it's turning into an embarrassing situation -- for both of them."

The "KUWTK" star left everyone thinking that she has not moved on from the "Midnight Memories" hitmaker, as she made quite a noticeable mistake while appearing at this year's Billboard Music Awards. She was chosen as a presenter to introduce Australian band 5 Seconds of Summer's performance of "She Looks So Perfect." However, she almost said 1D's name instead.

"And now we welcome, One..." Jenner started to say the boyband's name before immediately catching herself. "Guys, I'm the worst reader."

Kendall Jenner later blamed her mistake on her bad eyesight. "Andddd as if I wasn't nervous already!!!!" she tweeted. "#NeverLeavinMyContactsAtHomeAgain! #LOL #LessonLearned."