usually people don't 'reject' talking to you. For example, if
you call the girl and the girl is simply uninterested or want to
imply she's uninterested, you'll find that she'll always give you
one-word answers and the conversation will be terribly
boring.
And if you really want to hint strongly that you like her, you
probably should touch on the topic of bgr somehow and see her views
on it. This will give you an idea of your chances somewhat.
btw, good luck on your date! (If it happens, that is! 
)