The 27-year-old X-Factor judge divorced the footballer amid allegations that he had been unfaithful.
But according to Star magazine, she has told friends that she still loves him.
The report claimed that Cheryl told friends, 'I think I might be falling for him again.'
A source told the magazine, 'They've been speaking a lot lately and she's told Ashley that she hasn't been truly happy since they split, and that she still cries over it. She never stopped loving him.
'She's worried about being so far away from him when she relocates to LA. Cheryl knows she shouldn't meet up or get back with Ashley but he has been very supportive lately.'
But friend and mentor Simon Cowell is believed to have waded in and warned Cheryl against getting back with Ashley.
'He has repeatedly warned her that she will jeopardise her career if she lets Ashley back in her life,' the insider said. 'Cheryl doesn't want to upset Simon, but she can't cut Ashley out. She can't help how she feels.'