You can ask her stuff like "What music do you like?" or "What is you favorite color?". Just talk about general things and don't forget to listen to her.
You should talk to your girlfriend about it. Talk to her about how it makes you feel when you see her flirting with other guys.
Talk about Tom Cruise. (Or Justin Bieber)
You could talk to her about it and see if she changes or you could get a new girlfriend.
You should talk to him about what problems you have with his girlfriend. It is your friendship and should not be ruined due to some other person.
Talk to her! Deffinitly!
tell her u love her and talk to her about it
What happened during their day(s).
Talk to his mom. She should know him. ------------------------------------------------ If it doesn't work, talk to his girlfriend the way he's been acting or him specifically.
If she's your girlfriend you should be able to talk to her about it. If not you could ask some of her close friends maybe?
ask her about her day, or maybe you shouldn't talk at all, maybe you should just hold her
Be honest with her and talk about how you feel
You should calmly talk to her and sort it out between you guys.Hope that helped :)