On my first date with my now wife, our waiter figured it out for us.
We had been acquaintances for years through mutual friends and when we agreed to grab dinner that night, neither of us were sure if the other was in it for a date or just dinner with an acquaintance/friend. I guess we were being just awkward and giggly enough that our waiter (who had known us separately as regulars at this restaurant) blurted out “oh man, are you guys on a date?!?” We both just started laughing nervously while looking at each other and flop sweating. The waiter felt the awkwardness multiply and backed away like Homer Simpson into a hedge.
9 years later we’re married, the restaurant went out of business, and I’m still not sure if it was a date or not.
Edit: spelling is hard