Is my Fiance monitoring me or someone told?

Is my Fiance monitoring me or someone told?

A guy around my office premises recently befriended me & surprised me with a visit during lunch break.

My boyfriend questioned me about it after work hours and I was shocked. I managed to convince him it was a harmless thing and he said he doesn't want that to happen again.

I agreed but he won't tell me how he knew. Do you think someone in the office ratted me out since they all know him or something? And is it really wrong for me to entertain male friends?

Is my Fiance monitoring me or someone told?
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