Guy lied and told all his friends I had sex with him?

i only just found out today that he lied we had sex, I am furious because I am a virgin and now no one believes me. They are all slut-shaming me, it’s my word against his but I know the truth. He told his friend to not catch feelings for me because he already fucked me. I like his friend not him and I feel like he only told them we fucked to keep them away from me or something.
Guy lied and told all his friends I had sex with him?
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