For starters, Girls give blind compliments out all the time. Things that are just blatantly not true. Every guy here has been through a variation of this story. You're out with a girl, who's seen someone she knows, had to endure a ten minute conversation where they croon to each other, compliments flowing throughout the exchange, walked off with the girl afterwards and not 5 seconds after the other is out of earshot, been told "i hate that bitch".