Everyone has made some good points, but only Lio is Lio. And Lio, you should just be yourself.. not defensive, withdrawn, or masked.. just you. It has become more and more rare to see the real Lio. Perhaps people change (and I haven't been around much lately to see in person), but I don't think that charasmatic person is gone forever.
I disagree with both Calliander and Stone on a few things though.
Calliander vouches for controlling your behavior and watching the gal.. it seems more like forcing things to happen than actually letting nature take its course. Personally, I don't think that if you haven't already noticed little cute quirks by now, you probably won't.. or you're spending too much time together, and you're giving yourself no time to reflect on the person.
And as far as Stone's comments go (this is not directed specifically at any single person, it applies to everybody).. it's great to pin point your problem, admit it to yourself, etc.. but really don't expect to change it within any short time period. You can't start over and re-raise yourself.. period. Your childhood will always be with you, you can't and shouldn't deny it. Your upbringing can't be analyzed and broken down into rate-able categories that show what you're missing. It's not like you rolled dice to be who you are. For the love of god, get to know yourself.
Now.. Lio.. I don't know anything at all about this girl (I didn't know she existed until I loaded the site 20 minutes before I posted this), but I am assuming a few things.. she's at least 21 years old, and a virgin. If I'm right, I really don't think this is a very good situation. If this were down to votes, I'd vote you leave her unless she put out for you. You probably can get into her pants if you work on her, but I think it is more likely that you'll just prep her for the next guy who she'll meet probably while still dating you. Hell, she'll probably have sex with the next dude before the first date.
If it's really meant to be, send her on her way. Let someone else prep her.