I can not emphasis strongly enough about changing your behavior and the way you interact with her.
There are sub-conscience and primal things at work here. Do your homework and understand what woman are attracted to. Understand what turns them on. At the same time, understand the difference between attraction and seduction.
What you have been doing is not working.
Time to reinvent yourself. She may like what she sees.
What is a good book or resource to learn about that?