Is he flirting with me at work?

I just started working part time at a gas station with a younger guy I'm 30ish he's mid 20ish. We are always joking with each other and play fighting around. So I'm not sure what is going on. But he will also make remarks about how he thinks 30 is old. so I'm guessing he's probably just playing around at work because it can get boring? any advice?
Updates
+1 y
Ok lets update and say when I go into the station and he's working with another guy he is kinda stand offish won't hardly say anything to me. So what the heck. I want to be friends regardless but don't treat me like that. what's up with that?
Is he flirting with me at work?
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