So two weeks ago, a girl ,that I had been good friends with for two years, asked me out to the prom. At first, I had thought she was joking because she did not give any indication of interest to me prior, (that and because I'm a loner so I assumed that it was not for real), so I joked around and played it off, thinking this was a joke, it was not. Apparently, she had confessed to me, but in a vague way, months ago, and I had missed that confession. So up until the point where she asked me, I was unaware of her feelings towards me. Am I the Asshole for doing what I had done to her? In the event I am, or am not, what should I do?