you two are having an argument cause you're overworked and don't have time together. he feels like you don't care about him anymore, that makes him angry and frustrated.

"and look at you! you don't even have time to take care of your body so you become a little fat!! that's disgusting!!" he shouted irritably before going silent and realizing what he said.

"hell nah.... i-im so sorry, i didn't mean it" he said a little awkwardly and tried to take your hand.