I stopped talking to this guy and now he’s hitting on my (taken) best friend in front of me. Is he trying to spite me?

I stopped talking to this guy over a misunderstanding.. Nothing wrong happened on either side but I think he misunderstood it as a rejection. Now he's coming onto my taken best friend in front of me. She has a boyfriend. Is he trying to spite me? Why would he do this?

I stopped talking to this guy and now he’s hitting on my (taken) best friend in front of me. Is he trying to spite me?
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