You must have said something that she's doesn't like or did
something that irritates her or behaved in a manner that displeases
her.
Nothing surprising, cos guys usually screw up and clueless and lost
when tackling the girl that they like. Remember...girls are
emotional creatures, so don't go put your own
I-think-I-know-girls' formulae and expects girls to respond
accordingly to what you think you should get at the end of the =
sign.
Guys don't know girls, all they do is trying their best to dissect
a girl's mentality and see if they scored. And most of them time,
it's the girl who let the guy into her heart because she finds the
guy good enough for her and not because he is casanova. 