How do you get a girl out of your head?

Too start off she is about 3 or 4 years older, and that adds complication. She is extremely gorgeous, and probably the most beautiful girl I have ever seen in my life. And I am attracted to her but not in a ual nature. I mean I am, but I like the way she looks but not in a totally ual way. I don't really know her as well as I want to, and she hates me. I ruined her life, at least part of it. But I can't stop thinking about her, and I just want her to go away. All my friends think she is gods perfect creation too. I can't get her out of my head. I don't know what to do. I can't talk to her or tell her I like her because it is physically impossible, not in a literal sense but seriously even if I wanted to I couldn't. It would take strenuous hours to track her down. I know I have to face it that she doesn't like me, but I have never seen someone so beautiful, and my standards for beauty have been set way higher than they used to be.