This focuses on the comfort of shared history and the terrifying risk of ruining a stable friendship for the sake of something more.
Are you looking to from a book or show, or are you writing your own romantic plot? This focuses on the comfort of shared history
Patience is the name of the game here. By stretching out the "will they/won't they" dynamic, writers build an almost unbearable level of anticipation for the audience. This focuses on the comfort of shared history