I think you know immediately. You know as soon as your eyes meet, then everything that happens then on just proves that you had been right in that first moment. When you suddenly realized you had been incomplete, and now, you are whole.
almost kiss (“near-miss kiss”) - two characters staring mesmerized into each others eyes, inching forward ever so slowly, less than a millimeter away from lip-to-lip contact. this is it!they’re finally going to kiss! and then…they don’t.