Boyfriend “insulted me” says I’m overreacting?

I asked my boyfriend if I can have his username to an editing account he uploads videos too. I told him if I can guess it he said “yeah of course go ahead” I told him “hmm flowers something” he replied with no I than told him “nick something” which is his name he than put a straight face emoji and I said “lol is it not obvious” I said “no not really” he then told me “it’s obviously nickeditz you dumb f*ck use that with your 0 brain cells you have” I than got mad at him and told him to calm down he told me he was being “satire” and he was joking but it was out of nowhere and out of the blue. I told him to not talk to me like that weither he is joking or not all he said was I’m just trying to pick up a fight with him even though I’m not. Am I in the wrong here?

Boyfriend “insulted me” says I’m overreacting?
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