Hot/cold - ignore?

Coworker and I have been flirting for months. Lots of little things - light touches, caught stares across the room, asking about past and current relationships, lots of laughter, spending time together on projects that don't necessarily need to work together, sharing family information/stories, etc. We found ourselves at the end of happy hour and decided to go out just the two of us. Lots of flirting, she brought up many sex topics, laughed about what people would think, more and more touching, etc. Ended the night on positive note but nothing happened. A week later brought up the night and she pretended to be too drunk to remember and then acted like there hasn't been anything between us over the last few months and that coworkers shouldn't be together. I know the hot/cold game but I'm not about that. I'm at the point now, just ignore her and move on. Thoughts?

Hot/cold - ignore?
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