What I'd recommend doing now, or soon, is to sit down and reflect. WHY were things uncomfortable? Did she not look you in the eyes? Did you not look her in the eyes? Did you have trouble finding conversation material? Did you ask her questions about herself? Did she fail to reciprocate? Was she busy at the moment and unable to give you her full attention? These are all things that may have contibuted to a less than desired outcome of the conversation. Try to identify it. Maybe it was something you said that turned her off. Maybe shes just shy.

Plan. Act. Reflect. Analyze. Learn. Grow. Repeat.