Jennifer Aniston and John Mayer have failed to make a clean break after splitting earlier this year, according US reports.

Despite ending their on-again, off-again romance for a second time in January, they are currently said to be “enjoying their friendship” with hotel hook-ups and dinner dates.

"He really got to her, and she's hooked on him," a source tells Us. "She just can't let go."

"They are very close. They remain great friends. He thinks she's amazing, nice and smart, and he has nothing but respect for her."

Another source adds: "There's something about John that she just can't resist."

As we reported previously, the pair spent the night together at the Bowery Hotel in New York in September.

"Jen was there on the arm of John and they were all very lovey," an eyewitness tells People.

"She was in casual clothing as was he, and she seemed very comfortable around his crowd of friends."

It's also claimed the pair have recently double-dated with Jen's close friends Courteney Cox and David Arquette.

John and Jen in pictures