{From personal experience 😚}.

You were sitting in your high-school Chemistry class when the teacher said you had to refer to the worksheet you did the previous day and draw the covalent bond on the board and explain it. The small issue with this was that you had to go into pairs. The boys next to you were whispering, one of them saying that he could go with someone else.

"And you could go with-"

He says but mouths the last part. You could only assume it was your name he had mouthed because the other boy responded with:

"No, I will crash out."

This causes you to feel a bit sad/upset even though you're used to this type of thing.

You're the one kid in that class that nobody else likes/everybody thinks is weird.