"You thought you were in love and slept with him!" Sure, he wasn't the best boyfriend--but the thought slips away as quickly as it came, forgotten, and despite his fury, he settles some, looking more grumpy than infuriated instead. He's uncomfortable in his own body, not sure what all his emotions are doing. He wants to be angry. he has to be angry. "And you weren't even going to tell me to begin with, but you got drunk."