When your boyfriend is mad.
You don’t tell him what he wants to hear, you don’t apologize unless you know you’re not going to do it again, and you’re most definitely not going to turn the situation around and get mad at him. Just work things out without swearing and yelling, do things in a calmly manner. In the end, you’ll learn that you rather lose the argument then the person. Trust me, your boyfriend hates arguing just as much as you do.