"She and I fell in love like a couple of schoolkids," the 37-year-old country singer said Monday on ABC's "The View."
"I'm glad to know that that can happen. That that exists. And we really still care about each other a lot," said Chesney, who has a new CD, "The Road and the Radio."
He and Zellweger were married in May after first meeting in January.
The 36-year-old actress, who won an Oscar for her role in 2003's "Cold Mountain," filed for an annulment in September.