Whats the point of a man at my job being playfully flirty wih me but then he does it to others in front of me even?

He mentioned to me going out with him months ago but never invited me out so i figured ok he doesn't want me anyway.

I don't know what he wants. The flirting thing is kinda weird to me. Im a awkward lady. I dont flirt to flirt and often if im involved with a guy FLIRTING with me its cause he keeps doing it to me and i am really awkward.
Whats the point of a man at my job being playfully flirty wih me but then he does it to others in front of me even?
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