Ok so I met this girl in a night club, which I kind of already knew about a year ago, but still it was like a year later that I met her again. So the first time I was kind of drunk and high but completely under control and we danced a little and it was fine, I was just enjoying the night with my friends. I totally noticed the way she was looking at me but did nothing.

So last night I was in the club again and she was there (friend of a friend), and when I said hi she asked my name (which I took for an IOI), and kind of talked about how we already knew each other. So throughout the night she was dancing but every time I checked she was looking at me. I suppose I had the excuse that it was my friends birthday and he was trying to hook up with her (which didn't happened in any way). She was looking at me all the time and I'm sure she was expecting/waiting for me to do something, which I don't know what, because I clearly don't know how.

I know I'm going to see her again soon, but I didn't knew what to do in that situation. What could I've done and how could I proceed next?