That individual experience wouldn't be enough to make me want to break up with someone, but what it says about who they are and their feelings towards me would make me break up with them. That's a pretty clear sign of sociopathy. Sociopaths are very good at seeming sweet and saying everything right most of the time, but then they go and do stuff like this. It usually only gets worse and worse as they see what they can get away with. They'll make all kinds of reasonable sounding arguments that are really just victim blaming, blame shifting, gas lighting, whataboutism, etc. They'll act like the victim and make you apologize to them, that kinda thing. If any of that sounds familiar, time to move on. If you don't know what these different manipulation tactics are, do some research on them and other tactics people use to make you seem in the wrong and then watch out for them.