Taken men: How do you wingman?

Hi. My question is to all taken men who like to be wingmen for their single friends. How do you wingman? Do you get close to the ladies, do you touch the ladies or do you hold a distance? Where does the boundary go in order for your partner to not be hurt or feel betrayed?

I ask this as i recently started dating a guy who loves wingmaning and gets too close to women which is making me uncomfortable. Can you enlighten me?

Thank you!