‘Don’t be ashamed of me,’ she replied, ‘and you will have more than paid all.’ ‘It would require a life, Lizzie, to pay all; more than a life.’ ‘Live for that, then; live for me, Eugene; live to see how hard I will try to improve myself, and never to discredit you.’ ‘My darling girl,’ he replied, rallying more of his old manner than he had ever yet got together. ‘On the contrary, I have been thinking whether it is not the best thing I can do, to die.’
This scene is really interesting. Lizzie is still feeling slightly insecure in their relationship due to their social differences. It is clear though, how much Eugene has changed. He originally pushed away his feelings due to pressure of social standards, and now he would rather die than live and eventually do something to hurt or disappoint Lizzie.