Did I overreact?

We've been dating for a few weeks. He said:

"You cannot love one person it's biologically impossible"

"I have married friends they love each other but they do other things too"

I got literally shocked. I was like what about being faithful? He said you can if you love someone

I did got upset, I left and never talked to him again. Did I overreact?

Did I overreact?
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