In Search of Lost Time [volumes 1 to 7]

by Marcel Proust

And what could be more difficult, when it is a question of a suffering such as that of feeling that she whom we loved is finding pleasure with persons different from ourselves who give her sensations which we are not capable of giving her, or who at least by their configuration, their aspect, their ways, represent to her anything but ourselves. Ah! if only Albertine had fallen in love with Saint-Loup! How much less, it seemed to me, I should have suffered!