Why would a guy start calling me Ms. then my last name when he was just calling me my first name all along?

[Anonymous]

He use to call me my first name, and other people have called me by my last name but he decided he was going to start calling me miss then my last name.

[MissKimmy]

Sounds like he is flirting/playing with you to see how you react. If you like him play along and give him a nice cute nickname or a play on his name. Like turning Ron into Ronnie.

[Somethngcreative]

I do that to my crush. It's just a playful way to keep the conversation light and fun.