Seemingly rock-solid Ronan and Yvonne were torn apart when it emerged in 2010 that he'd had a 7-month affair with Boyzone backing dancer Francine Cornell.
The couple tried to move forward, but they eventually decided to go their separate ways after 14 years together in April.
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Speaking today on Magic FM, Ronan admitted: "It's been a tough couple of years to be honest - I deserve what I got.
"You gotta dust yourself off, pick yourself up and do the best you can do."
The former Boyzone star, 35, also told listeners he wasn't perfect, admitting: "You make mistakes."
Ronan and Yvonne have three children together, Jack, 13, Marie (known as Missy), 11 and Ali, 6.
© WENN / Daniel Deme
But despite the obvious sadness, Ronan remained upbeat as he talked about his new record and cameo in the movie Keith Lemon: The Film.
"It's a good laugh - mad, random fun!" he laughed.
Ronan is currently appearing as a judge on the Australian version of The X Factor alongside notorious tough gal Mel B - who didn't pull any punches when she sat in as a guest judge for the first episode of our series last weekend.
Ronan added: "She's exactly what you want on a panel - she gives it!"
Are you looking forward to hearing Ronan's new music? Tell us in our comments box below.
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