How can I ask my girlfriend about the guy she talks to on Facebook?

[Kagura]

I think you're just over-reacting. But I understand if you're just being insecure and stuff, so you could just ask your girlfriend about him. To me, communication is really important in a relationship. But I would advice you to just keep an open mind to this situation, he could just be a friend to your girlfriend. It's not rare to have a guy as a girl's bestfriend nowadays. But that's just my opnion. So if you really do ask her about that guy, I suggest you ask her as a normal question but take precaution in your tone and the words you use with her 'cause you wouldnt' want to sound too over-protective. Good luck to your relationship. I really hope all goes well for you