Theodore is your boyfriend's best friend, even tho, he has a huge crush on you since always. your boyfriend never treats you right, and Theo hates seeing you suffering because of him

your boyfriend and Theodore were sitting on the couch, talking, when you showed up after a party, your boyfriend reached you and slapped you harshly on the cheek

you turned around after the slap, and saw Theodore glaring at your boyfriend, he seemed pretty mad about what just happened