What does it mean when a guy calls you by your last name?

[Anonymous]

When he is around his friends and other people, he addresses me by my last name. But when we are alone he calls me by my first. What does that mean? Does he like me?

[Barrabus_the_Free]

I did that with a girl that I worked with that I ended up getting together with briefly. Her name was very similar to one of the guys on the crew, especially over the radio, so to avoid confusion I used her last name. I did it face to face, too, but I'm not really 100% certain why. I guess maybe because I wanted to maintain distance, and set myself apart from the dozens of simps that were constantly sniffing around. I don't like to think about the whole thing very much, and I don't like to think about her AT ALL, so I guess that explanation is as good as any.

[AlDoor6730]

I sometimes call the girl I like by her last name in front of other people as part of some weird power play, to try and make the girl think I'm cooler. It's hard to say with so little detail, and I don't want to give you false hope, but you should know if he calls you one thing in private and another in public, he has thought about it and has reasons for doing so.

[Anonymous]

too formal