When I first listened to David DeAngelo's seminar about being ****y and funny, I was just
waiting for opportunities to start spitting ****y and funny lines. In his newsletters he says "Lots of guys come up to me and ask me, 'how come I'm coming off as a jackass?' Well, maybe because you're not funny!" I thought to myself, pft like hell I'm going to be like those failures. Spoke too soon (almost TOO soon). I got burned really badly, got cussed out like hell from this girl I just met and I cried...yes I cried, I was like "Why the fvck doesn't this sh1t work for me!"
Over the years I've learned that I've always been ****y and funny, it needs to come up from the spot. What I used to do was spend nights in front of my computer with wordpad opened just thinking of ****y and funny lines to say. I was wasting my time, reality doesn't play out like a Japanese dating sim, there are trillions of different variations of things to say that the only way you can become the ultimate ****y and funny comedian out there is if you dedicated your life to memorizing the best lines to use at every single possible situation.
****y and funny jokes don't have to be absolutely hilarious, I actually like to think of it more as ****y and playful. Like others have said before the projection is much more important then what you actually say. Smiling, and even kino would have helped you in your situation, like a little punch on the shoulder. Note that you literally don't punch her, in fact you don't punch her at all. Just softly brush your knuckle against her shoulder and rub it off, like in this video except without the fail:
http://www.youtube.com/watch?v=KpC5_RQeG7Q&feature=related
Actually in my signature, click on kino and there's a seminar going into detail about kino and actually provides various kino techniques.