Open Question: What to do? Humiliated in front of a girl?

[feedcrawler]

I really like this girl at my school. However, I made the mistake of telling one of my friends, who has decided to constantly humiliate me in front of this girl (her locker is next to his). He took a screenshot of a private Facebook conversation where I admitted something quite embarrassing, posted it on Facebook and tagged this girl. He is also saying that I visit webcam sex sites and foot fetish websites. This girl believes my friend, and thinks that I am a massive perv and knows that I like her. How can I convince her that what my friend is saying is untrue? She is always with her friends, so I can't just go up to her and start talking.Thanks!

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