Does he have any idea of this attraction between you and his girl? Kinda start hinting around about his girl being cool and stuff. Say stuff like you need to find somebody like her. When he brings up the issue of hooking up with another girl, kinda jokingly tell him to go for another girl and let you have his current girl. See how he responds and gradually get more serious about it. There's tons of advice out ther for this situation. That's just my :twocents: