Do you know how Americans address people? Most Americans don't like to use Mr., Mrs. or Miss. They find these words too formal. They like to call you by your first name. For example, a man may say, "Glad to meet you. I'm Paul Miller. But call me Paul." A lady you first meet may say, "Please don't call me Mrs. Smith, just call me Mary." So when your American friends do not use your family name, they only want to be friendly with you.