Guy friend suddenly very quiet to me why?

Lynn1989
Hi a guy I work with and was close to has suddenly gone really kinda quiet and shy/mardy round me.

We had small argument but nothing major and now at work he teases me lots in front of others of on our own will only sometimes talk or not. He seems to give others lot more attention I notice if I give other guys more.

Any ideas? I have boyfriend but he puts him down as well to me.
Guy friend suddenly very quiet to me why?
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