This is kind of inspired by that scene in Ass Burgers (15x08) where drunk!Stan called Kyle a piece of shit causing Kyle to leave, then said "wait, I love you", only to call Kyle a piece of shit again when he came back.
Stan and Kyle get together and everything is amazing... until Stan starts abusing Kyle in drunken rages behind closed doors. Surprisingly (or unsurprisingly, he is obsessed with Kyle after all), it's Cartman that notices first.
Stan/Kyle, Kyle &or/ Cartman - Stan is abusive, Cartman notices first
Stan and Kyle get together and everything is amazing... until Stan starts abusing Kyle in drunken rages behind closed doors. Surprisingly (or unsurprisingly, he is obsessed with Kyle after all), it's Cartman that notices first.