That was telling when Sam was talking and he was actually looking at her and listening. Compared to when Casey talks and he's always staring at himself in the camera and making faces. And don't forget how he had to chime in with his sock puppet account on how "babes like Sam" hang around him. What a thing to say while you have a girlfriend.
Really shows how clueless Casey is that she doesn't realize that he has zero respect for her. Or maybe she does, and is so desperate that she just doesn't care.