Just because she's shy doesn't mean she's not confident. She simply hasn't had enough time to get to know them yet. Being the center of attention is basically her worst nightmare.
Please don't mistake being shy for not being self-assured. Please plan a small gathering as opposed to a huge party where 20 strangers will descend on her at once and freak her out.
If she isn't speaking too much at first, it's not because she's disinterested.
It just takes her a little longer to come out of her shell.
Meet with people who just like you and find real friends and true love.