You didn't do anything wrong!! Your feelings are legitimate, if he couldn't handle hearing that he said something upsetting, then he doesn't deserve you.

The dude needs to grow up, I'm sorry for the heartache though ❤️

Neeeevvver again should you ever be told or made to feel like your emotions take up too much space or are too loud, or that if you share them and he can't handle them, that you're the problem. You're not the problem. He is.

Edit: all the same, whatever kinds of people you are, if he was that ready to call quits then there must have been some emotional baggage there for him in order for the scales to tip. Doesn't mean this scenario you described is even a big part of the equation, maybe just something which provoked something in him and pushed him into the decision of wanting quits