Take it slow. There's no rush. Everytime you see her, try to touch her more and more and find out (body language wise) what's she is comfortable with. Things should develop naturally. It seems to me that she is uncomfortable with the fact that you are rushing things a bit. Just take it slower one step at a time.
I will do my best to reply with an educated, humble and honest answer. Ultimately, it is up to you whether you want to listen to my advice or ignore it completely. Sometimes, my advice may be wrong; occasionally, it will be right. Regardless, I want to do my best to give people answers they are seeking.