"I worked on my marriage," the reality star, 32, told PEOPLE outside his Pennsylvania home on Wednesday. "I went to therapy. I have huge bills so [detractors] can't denounce that ... For [Kate] to say she'd been working on it – well, I'd been working on it too, and at one point in time I just gave up. There's a point in time where you just say, 'This is not going to work.' So I just moved on."
He says he reached that decision in October 2008. In May, he says he began "talking" to Hailey Glassman, 22, but they did not start dating until after Kate, 34, filed for divorce on June 22, because it "wasn't appropriate."
Now he and Glassman are "boyfriend and girlfriend," he says.
Roger Wong / INF
He says anyone watching Jon & Kate Plus 8 could tell they were having problems. "We move further and further apart because we're so frustrated," he says. "But you have to understand reality TV. We can get in a fight today and have to do an interview tonight."
As for his soon-to-be ex: "I have no ill will toward Kate. She's the mother of my kids. She's a great mom. She does a lot for them."