You played it kinda passive. You let her think, but instead you should have made her feel and when you change the way girl feel you change the way she thinks.
Now she dont feel anything because you let it up to her. Instead better would be say like - I want you to be my GF or I dont want to be just your friend, I want more or we cant be just freinds and then kiss her, something like that.
I like how this girl said - we cant be brother and sister -
https://youtu.be/8qZHw60dDqQ?t=3m55s
https://youtu.be/8qZHw60dDqQ?t=3m55s
Doubt kills more dreams than failure ever will