She Had Three Nonnegotiables. He Had One.

Amanda Kay Cook was tired of relationships that went nowhere. So, in October 2020, she drew up three nonnegotiables and rounded up 30 matches — “like on ‘The Bachelorette,’” said Ms. Cook, 29 — mainly from the dating apps Tinder, Hinge and Bumble, and a few from friends. She rattled off her three nonnegotiables —…