Swayze died of pancreatic cancer eight months ago at the age of 57. He had been married to Niemi for 34 years.
"Both of us always wanted to have kids," Niemi told TV's "Access Hollywood" in an exclusive interview. "Just for whatever reason that's something that didn't happen and something that, you know, I have had regrets about. But some things, you just have to live with and be grateful for the things that you do have."
When asked of she still feels Swayze's presence, Niemi explained: "I have some chimes outside my bedroom and on a windless evening when I take the dogs out for their last walk, they ring. … So I like to believe that that's always him talking to me."
Swayze was famous for his work in the films "The Outsiders," "Dirty Dancing" and "Ghost," as well as TV's "North & South" and "The Beast."