I had been flirting with this new girl at work for several weeks. I took her out for lunch several times, and made it very clear I was interested being more than colleagues.
She said that she would think about it but needed more time. I figured I would keep after her and invited her for dinner and a movie... same response.
Finally I invited her out to a nightclub figuring I could move things along if I got a few drinks into her and got her on the dance floor.
Things were going well and after a few songs I went to buy us a couple more drinks. When I came back she was making out with another chick! I thought it was hot... but then when I tried to talk to her she said "yes, I'm a lesbian alright, and I'm going to stick with it."