How we cite our quotes:
For why go back like this to the past? he thought. Why make him think of it again? Why make him suffer, when she had tortured him so infernally? Why? (1.59)
Peter still suffers emotionally over being rejected by Clarissa. He can’t help but constantly return to the past in order to try to make sense of their relationship.
So she left him. And he had a feeling that they were all gathered together in a conspiracy against him – laughing and talking – behind his back. There he stood by Miss Parry's chair as though he had been cut out of wood, he talking about wild flowers. Never, never had he suffered so infernally! (4.20)
When Peter meets Richard, he immediately knows that Clarissa will marry him. He has been replaced, and feels abandoned.
She was exposed; she was surrounded by the enormous trees, vast clouds of an indifferent world, exposed; tortured; and why should she suffer? Why? (4.36)
Rezia has no one to turn to. Her sisters are in Milan and she feels that London is a cold and unfriendly place.