So you went out multiple times. You should have been able to kiss her on second date. Basicaly its you who should lead and do things that GF and BF does. those little things like kisses and holding hands. And then take it even further from there. If you dont have experience then its gona be harder for you to progress with such a young girl where you have to do and think things first.
While you text you could ask her questions. To get to know her better.
When you meet you could get close to her physically.
Here is the questions - http://thestallionstyle.com/20-really-interesting-questions-to-ask-a-girl-you-like/
Here is how you should get close to her(picture at the end of the guide) -
http://www.loveforum.net/the-relationship-news-and-articles/85674-guide-interacting-girls.html
Doubt kills more dreams than failure ever will