Something that may have been this happened to me in high school. A girl came up to me in the hall between classes and said something along the lines of wanting to ask me out or admit a crush or similar. I gave a confused look, then noticed what I took to be other girls behind her looking at us and giggling.

I told her ‘now I get it’, that her friends put her up to it. And I left.

I’ll never know if I was right, or if they were giggling because they were teenagers and she finally got the courage, or if they were even her friends.
For my own benefit I have chosen to believe I was right at the time.