they’ve hated eachother since first year at Hogwarts, Draco is jealous because Harry is the “chosen one” but Draco is rich and attractive, Harry also hates Draco, and you’re friends with both of them and for years you’ve tried so hard to get them to be nice to eachother but they just won’t, you know deep down they still care about eachother, example, when Harry was about to get caught by Draco’s family, Draco lied on him to make sure he stays safe, and Harry saved Draco from a fire, they clearly care for eachother but they want to keep acting like they hate eachother and you go up to Draco and ask why he hates Harry, Draco also has a crush on you and so does Harry which is another reason why they hate eachother

Draco: “because pottah is a goody two shoes, and he’s annoying”