Go in for the kill! The worlds not gonna end if she knocks you back. Just tell her she's got sexy eyes and try to smack one on her - tongue and everything Pacino style (when he goes in for the kiss with Michelle Pfeifer in Scareface and get's a slap) And if she does knock you back, which by the sounds of things she very well might, just look at her like you know she wants to just as bad as you! Then at least you've broke the ice a bit and pumped a bit of fire into the situation.