Why he won't mention her?

Well I don't want to bust your chops, but I have a girlfriend, and I kinda do that. Let me explain, I love my girlfriend to death, yet I can't tell people I work with, or something like that. At work my boss was a girl, and I dint want her to know because I feel like she'll get jealous in a way and treat me different, and there were I worked, there was a subway were I made friends one a girl and the other a guy, then I felt a funny vibe from the girl so I just never told her I had one, I dint think she was attractive what so ever, even like that I dint tell her. I never told the guy either, 5 months and he never knew. Now I work somewhere else and work with another girl who is cool and all, yet I feel like I don't want to tell her I have one because I feel she'll be like "oh, ok" and stop treating me all cool, we don't flirt whatsoever, well at least I don't, if any. The point is, even if I'm wrong, that I don't want anyone treating me different just because I have a gf, I feel like I'm breaking hearts, even if I'm really not. If she really is flirting with me, then, I really have to say I do have one, but if were just friends, then it's a real problem telling them that, especially if a long period of time has passed by, then she'll be like "how come you ner told me". I just want to be good friends, maybe he just wants to be your friend, doesn't want to hurt you, or feels like he can't tell you anymore since he evaded so many times. I tell anyone I can, I don't hide it, but if I feel like they are somewhat interested on me, I feel bad, and just don't tell, it's not that we are ashamed or anything. It's just a problem, that is hard to explain.

If he is flirting with you, then this is another story. Try to find out weather he is attracted to you and if he has a crush on you or not? In that case you may be able to demand an answer for your question. ;-)

Honestly, some times us guys like to have our own privacy, even from friends who are girls, some times I have this strong feelings for my friend that I like her so much, she keeps asking me about my adventures with girls and weather I have girlfriend or not and simply I ignore her questions the same way that guy do.

For me I do not discuss my girlfriend relationship with my female friends cause they may open my eyes for things that I may not thought about before and that may ruin my relationship. On the other hand I may go to them asking for help with girly issues. In all cases I do the same that that guy you mention do. I like to keep private things inside me and do not like to share every thing with people I know. :-)

I am kind of in the same situation now. I have known this guy since high school and at one time he was pretty into me, but for some issues of my own making I was not able to pursue a relationship. That was a few years ago, but I still loved him and we tried to be friends. Now he has a girlfriend and they were dating for awhile before I found out and I had to drag it out of him. Even now if I say something about her it is "does she have to be the topic of our conversations. After 6+ months he still has not told me her name, I know it but not from him.

Be very careful. It sounds like this guy wants to have his cake and eat it too. My friend acted like he did not want me or what I offered to him when he was single, but now that he has a girlfriend. Well that is a different story and it has now become my problem, I seduce him and frustrate him blah blah blah. It may be the same with your friend. If he won't tell you about his girlfriend even though you know that he has one, he is trying to gage your reaction and see how far you are willing to go before he tells you. If you show that you just want to be friends and nothing more, he might be more inclined to talk about her, if you show that you are interested in him for more romantic reasons, then he will try to string you along to get what he wants and keep her a secret. Be very careful, it is best to leave him alone and don't let him play you. It will be hard, but it is what I had to do.

That's shady. Seems to me like he wants to keep his options open. He might want to hook up with you and is afraid that if you know about his girlfriend you won't want to. He probably figures it'll be easy to cheat since you live far away and he can juggle you both. Keep your eyes open and be careful, this is a recipe for heartbreak.