How did I attract this girl without trying? So confused please help!! THANKS

I've been trying to improve on my game and I don't have issues with having a conversation with a girl or approaching her. However, I do have problems with keeping her attention I suppose I don't escalate properly. Anyway my question is this: how did I completely attract this one girl and keep her into me the WHOLE night and I didn't even try? The reason I am confused is because I had no intentions on gaming that night, I thought it was me and my two other buddies hitting the bars. But my friends brought girls and right off the bat one of them started talking to me and showed me all kinds of ioi's (playing with hair, looking into eye, attention towards me, you get the point ha). I didn't even try to talk to her I was in fact trying to stay away because I think my friend is into her but she was definitely attracted to me. So if any of you guys can help me out that'd be great so I can do whatever I did last night every night I go out and game well.

The fact that you specifically went out with the intention of NOT gaming that night means you probably were completely uninhibited with the girl and she saw it as confidence. After all, if you're not trying to get in her pants, you're not going to be worrying about what you should and shouldn't say, right?