I'd say it was a tough one, but she's likely losing/lost interest and just humouring you now. Only way you can be sure is to just try and arrange again and see what happens. I'm shite at this stuff but maybe say something like "Listen here you beautiful broad, I've stood in the middle of the street with my phone taped to my head just to get the best signal waiting for your reply, why are you playing games with my heart?" It's a shit cheesy line I've seen used a few times, sometimes it works, sometimes it's -blam!-ing terrible.