Was my manager’s reaction to seeing me talk to another guy jealousy?

Im quite new in a company and there is a crush with a manager, one day at lunch time I was talking quickly (about where to get food lol) with one of the guys … the manager arrived and saw the scene, quickly looked down and moved away?

he really literally stopped from getting in the room and turned back.

was this jealousy? Even if i was just randomly having a banal discussion?

crazy part is that we were not alone we were several people in the break room

Was my manager’s reaction to seeing me talk to another guy jealousy?
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