The main couple in New Girl was Nick and Jess, who first got together in season 2, but their relationship was a mistake. New Girl followed young and bubbly teacher Jessica Day (Zooey Deschanel), who moved into a loft with three strangers she found on the internet after finding out that her boyfriend cheated on her. After a period of adjustment that wasn’t easy, Jess became very close to her roommates Schmidt (Greenfield), Nick Miller (Johnson), and Winston (Lamorne Morris). The bond between Jess and Nick was much stronger right from the get-go, and although Jess had several boyfriends in New Girl, she and Nick ended up together, getting married in the final season. A flash forward in the season finale revealed they had started their own family and remained close to Schmidt and Cece, and Winston and Ally.
https://screenrant.com/new-girl-jess-nick-romance-couple-bad-reason/