: I wouldn't worry about it until she starts talking to him all the time. First she'll start out saying that their just friends. Then she'll start telling him things she feels she can't tell you which is wrong. And then you'll find yourself a month later walking in her house to catch her with him. Trust me it happens, if you get serious with this girl and she tells another guy her problems instead of you get rid of her or you'll get hurt. Just look for the signs and give it time for now.