Sometimes your crush shows a hidden talent that doesn`t shows too ofter....In my case, her talent was arabian dancing. She was very skilled and moved in a gracefull way, so i was lost in her movements contemplating such a magnificent display.
When people start shipping you and your crush together, because the connection between both of you is visible. (it happened to me XD).
When kids who see you like each other try to be your wingmen (it happened to me too)
Developing inner jokes between both of you. Guess this one is a classic.
Doing something both didn`t know how to do. Like dancing. We sucked, but we laughted a lot about the whole situation.
This was more of a case of someone who had a crush on me, i got a scrape and she was studying to be a nurse, so she started treating my scrape. (didn`t happened anything romantic, but these moments can be adorable when both people like each other)