Most Helpful Guy
Tell her your fine with her having friends but the way she acts around him when your around is unacceptable. Also that texting during a date is rude and ask her how she'd like it if you did that. Tell her you trust her but play punching and being physical with him infront of you makes you feel small.
You don't want to be that boy friend that makes her cut ties with people she knew. Also ask her if she'd like you to talk to him.