The 41-year-old actor, who was jailed for assault after attacking a man when he was 16, said he has hurt a lot of women in the past after one of his first relationships left him broken-hearted, reported Contactmusic.
"I was a very nice guy early on. The first time I fell in love, and when I was in jail, she denied me, she didn't want to wait for me. I don't want to blame her now but my heart was broken and I decided, 'I'm never giving my heart to a girl anymore.'
The couple, who have children Ella, nine, Michael, seven, Brendan, four, and Grace, three, first met in 2001 and tied the knot in August 2009.
On being asked what made him change, he said, "It's a process. Hearing the sound of those jail house doors closing - that was one of those moments. For me it was like, wow this is not where I want to be. This is not the direction I want to go in. I have to start to get my head in the right place.