BrentNumber1: I think you should tell her that you cannot be friends with her. As long as you are around her, you will never be able to move on. You will never be able to fall in love with someone else. Nobody will ever look as good to you as she does. Tell her you think its best that until you meet another girl, that you guys don't talk to each other. See how she reacts.
I personally think that if you can be best friends, you have the potential to be life partners. Sometimes the other person doesn't see that right away. She will date other people and either find a new best friend to spend her life with or realize how great you were and decide she wants to be with you.