Is it normal to have your bro calling you his?

I often hang out with some dudes in college and we're pretty close. Our group was males only, often arranges sleepovers and small parties (basically just chill in someone's room, pizza, watch movies, play classic games, therapy sessions, etc.) I noticed that some of my fellas enjoy physical touches (my introverted ass is not a fan but I don't mind), and sometimes call me "my [name]" in their sentences, like: "My [name], wanna hang out at 6?" Am I overthinking or is this how close friends call each other?