My friend has been dating a guy for 3 months now and since Day #1 he's been honest with her about dating another girl. My friend doesn't know the details of the relationship (she'd rather not know), but it still obviously bothers her as they progress in their relationship. She's now at a crossroads where she has opportunities to date other people, but she feels guilty about ie since she is developing such strong feelings for this other guy. He hasn't mentioned anything more about this other girl since that one, inital talk. And there's a big possibility that he's not even seeing her anymore. But the lack of knowledge is driving her crazy! She's worried that if she brings the subject up, it will be this huge turn off and it will destroy the "good thing" they have going (I disagree with her that it's a "good thing" in the first place... but that's a topic for another time). She has no idea how to talk to him about this. How does she casually mention it, without him getting the impression that she wants to be really serious with him? She's not looking for marriage immediately - she kinda just likes what they have going and would like to keep moving forward. But the thought of another girl is really distracting her. I think she's just afraid of hearing the answer that she doesn't want to hear... Any advice?