“It was scary and exciting at the same time, but definitely the right thing to do,” she said.
Since the separation, Cheryl, 27, has been romantically linked to professional dancer Derek Hough.
The singer, whose second solo album “Messy Little Raindrops”, will release next month also said she felt completely betrayed by Ashley, 29, after learning of his infidelity but she has now moved on.
“Yes, definitely I do (feel betrayed). But I’ve got to take everything that’s happened and learn from it. I accept that’s a chapter of my life that’s finished,” she said.