Normal or concerning conflict?

I 28F have been dating my boyfriend 27M for a year. And, over all it has been a good relationship. at least given my history, it's felt healthier.

Normally we resolve conflict pretty quickly and communicate well. Though we can butt heads often. I think it's because we are a little too alike sometimes. Which has it's ups and downs.

But today, we had an incident that lead to a pretty uncomfortable fight. And now I'm at work trying to process it.

He had ASKED to hear some of my work stories, so I was telling him. And after a few minutes, he was very engrossed in scrolling on his phone. And I asked if he was listening. He said yes, but clearly wasn't. So I asked if he could not do that while I'm talking because it doesn't feel like he is listening.
He just said that he was and never looked up at me. So I said it was rude, and he just denied that it was?
So obviously I was mad. So I was a little rude back. Which I shouldn't have been because that always only escalates things.

But I however, apologized for it. And then tried to explain WHY it felt inconsiderate to me. And he told me to "break up with him and date someone more polite then". To which I said, you'd rather BREAK UP, than look at me and pretend you're listening for a second? And he called me condescending and told me to "fuck off".
Which is VERY unusual for him to talk to me like this.
So I haven't spoken to him since this afternoon and am now at work for the night. And I feel a little ill.
I don't want to end this, but it was very jarring to be talked to like that. And not even receive an apology.

Normal or concerning conflict?
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