Why a guy says overnight and over a silly fight that he doesn't have any feelings anymore, then proceeds to block you on all social media?

We had a fight in which I was guilty first, but then I told him he should search for another woman and therefore he just assumed I insulted his mom (which i NEVER did), proceeded to ignore me at the end to tell me he wants to be friends with me but that he no longer has feelings towards me, the he blocked me on all social media except whatsapp, when we were real fine before and he was super sweet with me. It hurts cuz we were good friends before

Why a guy says overnight and over a silly fight that he doesn't have any feelings anymore, then proceeds to block you on all social media?
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