Why does he deny having a girlfriend to me and only me?

BrunetteBabe1005
This guy I like I have been talking to. He'll deny that he has a girlfriend, and I know the girl he is with. I found out from friends that he is definitely with her, and I can just tell. Like he asked me out and he lied to a couple of friends and said that we were dating, which is odd. He still flirts with me and everything, and when I said "Hey you have a girlfriend" he got all quiet. He brings her up to me but he denies being with her and having sex with her to me and me only. He'll admit it to other people.

Like why does he do that? He acts as if he is single to me? I of course am not gonna go out with him, but I am just curious as to what that might be? Also he told other single girls, that he has a girlfriend. So if he was just looking to cheat wouldn't he deny it to the single girls as well? I am just curious and wonder what your thoughts might be on this! Thank you!
Why does he deny having a girlfriend to me and only me?
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