Sharon, - Your posting was as follows: "I have been in a "relationship" with a 25 year old boy for almost 1 year. Although we are "friends with benefits", I feel like we are (were) pretty tight. He called me Christmas Eve, wanting to come over to my house. He brought over the woman he considers his "girlfriend". She obviously has no idea about him sleeping with me. Why would he do such a thing?"

As a guy, I would like to put my 2 cents worth in, too.

First, I would like you to kno that I agree with VictorM when he said, "For a guy to have sex with someone and have no emotional attachment is quite possible, and in this case, likely. It's interesting that you called him a "boy" just because he's younger. Maybe I'm reading too much into it, but could be that you haven't taken him very seriously...Maybe he brought her over as pay back for a less then respectful treatment from you...Or, being a guy, maybe he's hoping for a threesome..."

However, the question I have for is: do you feel cheated on? If all he wanted from you was sex, can you believe that he is not having sex with his "girfriend"? And if he is, should you not be concerned about STDs? Don't ask him. At this point, if he can nail two women at the same time, he will lie if he believes he has to. And one more thing: are comfortable being the other woman since he introduced the other girl as his "girlfriend"? There is much you should consider here.