Me and him are of equal rank, and we work on projects together. He is bit more outspoken than I am, and he gets his point across. We get a new co-worker, and he automatically jumps at the chance to invite him to lunch, and then he gets assigned to give him a tour of a facility, in which I have more knowledge of it than he does. I get invited as if I were his subordinate or something. If he begins to show off, what should I do?
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