How do I deal with character shame?

A boy once liked me but got rejected. He then lied to his friends about sleeping with me & breaking up because I was boring in bed. This rumour caught up & I dealt with it horribly. His friend checked up on me by telling me he was sorry but I felt deeply hurt by the rumour & I told his friend that I was actually pretty kinky to save face. I felt humiliated when he called me vanilla. Now the kinky rumours have spread & iam teased by that. Oh god, Iam actually very shy & I wish I never met him. How do I deal with this?
How do I deal with character shame?
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