Why would a guy reject a girl and not like it when she goes no contact?

I got friendzoned by a guy I was already seeing and sleeping with. He met a girl and felt a strong connection with her. I went no contact and he’s still trying to talk to me and he gets mad when I won’t respond. He sends rude texts mocking me saying I’m sad. They are together and already living together. I doubt he valued our “friendship” that much.

Why would a guy reject a girl and not like it when she goes no contact?
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