SELF CONFIDENCE DUDE!!! U gotta be a man and go for her! Here are some links that might help.
1.http://www.sinnsofattraction.com/
2.http://seductionmadeeasy.com/approaching-women/how-to-approach-a-girl-successfully/
3.http://www.google.com/url?sa=t&source=web&cd=4&sqi=2&ved=0CCkQFjAD&url=http%3A%2F%2Fwww.ehow.com%2Fhow_5228635_approach-girl-ways.html&rct=j&q=ways%20to%20approach%20a%20girl&ei=tlX9TdbIFYWqrAfJtITyDw&usg=AFQjCNE5-vIvJ7MUfimS0HnSDUQx4ASPgA&cad=rja
4.http://www.google.com/url?sa=t&source=web&cd=5&sqi=2&ved=0CDIQFjAE&url=http%3A%2F%2Fwww.secretsinseduction.com%2F&rct=j&q=ways%20to%20approach%20a%20girl&ei=tlX9TdbIFYWqrAfJtITyDw&usg=AFQjCNGw9eyVa4Cf4vRiqclz2kpt31ZPmw&cad=rja
5.http://www.google.com/url?sa=t&source=web&cd=6&sqi=2&ved=0CDoQFjAF&url=http%3A%2F%2Fezinearticles.com%2F%3FHow-To-Approach-A-Girl-In-3-Amazing-Ways%26id%3D904042&rct=j&q=ways%20to%20approach%20a%20girl&ei=tlX9TdbIFYWqrAfJtITyDw&usg=AFQjCNHlul2d4NSh-RpjkPg6muFhapjpIA&cad=rja
Good luck. BY the way, do u have a picture of the girl? LOL