The actress, 27, filed for divorce from Mike Comrie in February after five years of marriage. While speaking to the glossy about the split, Duff said she's not sure "people are meant to be together forever."
"Things happen over a long relationship that you can't always fight," she said. "A marriage of 20 years, the accomplishment of that must feel really great, but there are also huge sacrifices. I just always want to fight for happiness."