Welcome to bpdfamily
We've all screwed up like that at times, even after lots of learning and improving our side of the relationship. What happened after the second argument?
There are ways to control our emotional reactions, and ways to communicate any kind of message while minimizing the chance of setting off an explosion. I highly recommend going through the Lessons that are linked on the right side of the page. They will help you reduce the conflict in your relationship and also set boundaries to protect yourself (it's not all about being "accommodating". By the time you get to the shouting match, the best thing to do is just walk away and take a time-out -
How to take a time out.
I hope you get a chance to start looking over those resources, and feel free to tell us more about your relationship! How long have you been together? It seems like you're living together now?