Guys, whenever you get jealous of a girl conversating with another guy, how do you act upon it?

So in real life when you see a girl that you like talking to another guy and you get a little jealous, what do you do?
Do you act like you’re fine and join in the convo or do you walk away from the area?
I hope that makes sense!

Guys, whenever you get jealous of a girl conversating with another guy, how do you act upon it?
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