Pupn4p doesn't just think he has to leave, he's convinced that they want him gone and that they've wanted him gone this entire time. He's nearly inconsolable and every reassurance that D tells him he refuses to listen too, because he just doesn't believe a word coming out of his mouth anymore. Even after they /both/ explain to him that they don't actually want him gone, the Puppy refuses to unpack his suitcase. Actually, he adds more and more of his treasured items to his suitcase so that he never loses track of any of them. He's just convinced it's all a ploy until the bombshell of him needing to leave is dropped. Countless nights of him sleeping alone, regressing in his speech because he refuses to talk to them, and just him breaking down on a regular basis. D, himself, is just completely devasted and distraught because he knows that no matter what he does, he'll never be able to fix it. He'll never be able to heal that wound that his own actions left on the Puppy's heart. He doesn't even blame G, because he knew the outcome, and he should've made it clear from the beginning that no matter how many fights happened or cold-shoulders were given, that the Puppy was never going to go anywhere because that's his decision. Him allowing G to think he has the upper hand the entire time is what leads to this situation, and it breaks his heart. He only blames himself.