True love -- and awfully cool.

A woman from Indiana promised to donate her kidney to a stranger, and after three years, that woman and the recipient of her kidney got married.

Chelsea Clair met Kyle Froelich  at a car show in 2009; at the time, she was 22, and he was 19. A family friend had told her that he needed a kidney transplant, and she, right on the spot, offered hers.

Kyle didn't think it was actually going to happen -- that she wasn't really serious. But Chelsea said this to ABC News after they learned that her father actually passed away because he couldn't get a bone marrow transplant:

I just felt like I would have wanted somebody to step up [for my father], so I just wanted to help him.

There are almost 100,000 people on a waiting list for kidney transplants, and it just so happens she could help Kyle out. Right after their surgeries, the pair started dating, and just a couple weeks ago, they got married.

"There's a bond that no one else, unless they've done it, can know," Froelich, now 23, told the Indianapolis Star. "She's my best friend."