First off, try to get rid of routine whenever possible...in the long run it'll only hold you back. She's just responding playfully, trying to laugh it off. Wouldn't say she's like you right away, but she opened up, which is the important part. Get her laughing and she's open, now stop negging. Most guys seem to over-neg to a point where it gets annoying.
You could qualify her: 'Maybe they'll take you if you show some good qualities, what are you good at? I prefer a good cook when I get abducted
'You could also continue cocky funny: 'Hold my hand, I'll transfer some of my awesomeness to you so you can come along'**grab hand**
The second one is a bit cheezy though, but if you bring it with a smile it'll atleast get her laughing.