Will a SF courier call the customer girl like me?

You can't judge whether SF Express likes you just by his name. I may use the word "little girl" to address female customers out of courtesy or address habits. Therefore, it is impossible to judge whether he really has feelings for you just by his address.

If you want to know if your little brother likes you, you can look for some clues from his manners, such as whether he often asks you about your recent situation and whether he takes the initiative to chat. However, it should be noted that we should not put authoritative judgment on appellation, but should observe and think more about his behavior and better understand his real thoughts.