Girl on a night out, was she interested?

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I don't consider myself particularly great looking, but this girl was.

Basically, I was out having some drinks and I went out front for a cigarette by myself. I see this girl walking up to the bar entrance with her friends. Next thing I know, she's stood in front of me, asking me for a lighter, even though her friends are all smoking. So I give her a light.

Next thing I know, she's firing all kinds of questions at me. If I'm having a good night, if this bar is any good, what my job is, what I study at university, and telling me a bit about herself. Now, whenever a stranger strikes up a conversation with me my guard's usually up a bit, and as a guy who isn't particularly confident, especially so around an attractive woman. All the time I'm being "cool" and not appearing too keen (inside I'm nervous as fuck!) but she's chatting away at me, touching me on the arm, looking me in the eye. The conversation ends when we both finish our cigarettes and I make a quick getaway.

Thoughts? Was she into me, or just being drunkenly friendly?