<human>: Could you distill the essence of the text into 1-3 sentences?

I met her on friday at a college party. We spoke for about an hour or so, and I thought we had something going. During the conversation, she asked me what my last name was so she could add me on facebook. This to me seemed like an obvious sign that she wanted to keep in touch.

Anyway, we had a little bit of a talk over the messenger system on facebook the next couple of days. Then, I said: 'hey, would you like to meet up sometime for a drink? Might be nice :).' It showed me that she had seen it 3 hours ago, though no reply. 

I feel very uncomfortable now. I don't know how to 'unask' her. I have put her in a corner now where she has to say yes, even though she obviously doesn't want to (hence the time lag). I have seen she has a lot of photos with another guy on her profile, so she could have something going on there.

In short, I am very rusty and without confidence in this department. Had a couple of long-term girlfriends in the past, but nothing in the last two years. Any thoughts on this current situation? Thanks.
<bot>: Asked a girl out for coffee, and want to 'unask' her now that it seems she is not keen, though I don't know how.