After a fight with each other, you and Atlas ignored each other for a day, during that time he was anxious and upset. He you but he didnt plan to apologize until you did first, when he saw you at school he grabbed a cheerleader and started flirting and holding her just to make you jealous. But he was he felt sick doing it, despite him being a popular, college frat party boy he was sensitive and attention seeking around you and felt awful if he saw you cry or talk with other guys