Hi Social Misfit,
Hmm, somebody has been listening & taking into account
different opinions
And I thought I'd
never see the day 
Alrighty, here's something from a WOMAN's perspective, yah?
Listen to Dev. His advice about being yourself is correct, although
he may sound cliche. Some girls may find the tongue-tied guy who
keeps tugging at their shirt sleeves charming & adorable, but
that's Not always the case. Some girls hate it (myself included)
when a guy keeps hounding them because they like their own space,
their independence, & blah blah blah.
You can't cater to every single girl's tastes, otherwise there
wouldn't be the saying, "There's someone for everyone". But you
will charm some people, & who knows, you might find your
partner amongst these.
Moreover, if you're Not being yourself, chances are, the girl will
know
Women rely VERY
HEAVILY on intuition, & we DO have an eye for detail,
especially body language 
Just relax & be a friend to this girl. Get to know her better,
& let her know you. Treat her as you would treat a friend, No
pressure, & have easy conversations. If she can open up to you
& trust you, then you guys can take it further.
FeowFeow