There are various different kinds of cinematic romance, but friends-to-lovers movies remain popular for a reason. Some of the most popular movie romances are those involving a friendship that develops into something more. The setup is simple: lifelong best friends one day realize they're in love with each other. Often one friend is in love from the start but it's unrequited, with the other coming to realize that the one they truly loved was right in front of them. From rom-coms to superhero stories, these friends-to-lovers movies strike a chord.
https://screenrant.com/best-friends-turned-lovers-couple-movies-ranked/