<human>: Can you provide a brief rundown of the text in within 3 sentences?

So this wonderful story begins about six weeks ago. I was a small group leader for orientation at my college and this beautiful girl happened to be in my group I was leading. We both took an interest in each other (unbeknownst to either of us at the time) but chose to not make a move to prevent things from being awkward. 

About 10 days pass and we see each other again during a day drinking holiday and we dance for a while before I work up the nerve to kiss her, what a fool I was. we spend the rest of the day partying with our friends before heading to her place where we have absolutely mind-blowing sex.

Fast-forward a few weeks, we've gone on a few dates and continue to have mind blowing sex. The problem sets in when other people are around. When it's just the two of us she's prone to kissing, holding hands, all the lovey dovey shit which I love. Throw other people into the mix however, and that stops instantly, to the point where I'm fighting just to grab her attention

About a week ago I confronted her about how I couldn't handle this dichotomy she kept up. What came next was a bit unexpected: I learned of her woes with past partners and how it colored her view of relationships. It also didn't help that I had recently brought up the idea of a committed relationship, which was met with a less than favorable response. Despite the above, we decided to keep talking but toned it down a lot. As it stands right now we are no longer sleeping with each other, yet neither of us are seeing other people. 

What confuses me the most is that she has told me on several occasions how I am the best guy she has been with both on a romantic and sexual level blah blah blah, and yet she's unwilling to take the plunge, somehow content with this half-assed, non-committal thing we have. Suffice to say, I am not happy with this, at all. I don't want this to stop, but I don't know what to do.
<bot>: Wanting to get serious with a girl that talks a lot of talk and is a great lay but can't/doesn't want to commit. How do I make this work, or should I accept defeat?