Does she want me to call her?

I've been working with a girl for the last few weeks on a project at work, which has now come to an end so I probably won't see her again by chance. I've been getting some signals that she might like me (difficult to tell, as we haven't been alone together and she seems quite shy).

Just before we parted company I struck up a conversation so that I could ask her out. The only negative thing was that I felt like I had to keep it going and she wasn't making it easy for me to ask. However, eventually I said we should keep in touch and go for a drink sometime. I gave her my number (mistake according to some, I know) and then she said "Yeah, definitely" and gave me hers.

I know this isn't much to go on, but do you think she is interested or was just trying to be polite? If the latter then I don't want to bug her...
Does she want me to call her?
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