: Ensure your protagonists have goals and identities outside of their love interests.
Are you focusing on or writing a fictional couple for a project? Five things: creating believable relationships in fiction : Ensure your protagonists have goals and identities
: Recognize that romance evolves from the "Euphoric Stage" (6–24 months) to "Deep Attachment" (7+ years), with a critical "Crisis Stage" often occurring around year five. : Ensure your protagonists have goals and identities