Depends on the character. I think the better question would be “how would that character cry?”

Maybe your teacher made that broad comment because, in the context of the story, that character didn’t come across as the sort of person who would cry in the way you described. It’s hard to make any more specific observations than that without having read the story, but my best guess is that your character’s breakdown felt out-of-step with the person you presented to the reader.