Guy best friend called me his bitch?

Hi, so this guy, one of my best friends of mine called me his bitch out of blue. We were just hanging out and he literally told me that I am his bitch and introduced me as his bitch to everyone around. Honestly, I love that guy and all but I'm not sure about my feeling. Like I feel like part of me had always been wanting to get out of friend zone and just make out with him or something. At the same time, I do feel a bit uncomfortable being called a bitch even when I know that he didn't use it in offensive way. I just don't know what to do at this point. Do I just act as nothing happened? Should I be offended? Should I risk my friendship with him and go for hot hook up?
Guy best friend called me his bitch?
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