Your girlfriend has a guy friend and they txt each other to much?

I would tell her i have no problem with you talking to other guys but sometimes it makes me feel jealous and how would you like it if i was always texting a girl. Turn it around a little and see how she would feel she may not even know that its bothering you and may be trying to see how much you care and if you'll get jealous. And if that doesn't work try to ask the guy to lay off a little say i know your friends and all but she is my girlfriend.