you ran out, the worst thing you could do is run out. She might think your some kind of freak or pranking her with a fake number or something. You shoulda walked out mate, that wouldda got a call back (probly its like a 25% chance if you gave her your name), i'm like you (got no guts) so thats why i only have relationships that last about a week or so but i've been eyeing a girl for a while now (4 years) and i'm hopeing that'll go good so my advice for you RELAX if she said yes she likes you if she says no theres plenty more fish in the sea