What is what does it mean when a guy calls you charming?

When a guy calls you charming, it means that he finds you attractive, charismatic, and likable. Being charming is a positive trait that often includes a combination of humor, wit, confidence, and warmth. It's a subtle compliment that suggests he enjoys being around you and appreciates your personality and demeanor. This can be a great sign if you're interested in developing a romantic relationship with him. However, it's important not to read too much into it and to wait for further signs of interest before assuming anything.