Read it through once

MARLOW. (Aside.) By Heaven! she weeps. This is the first mark of tenderness I ever had from a modest woman, and it touches me. (To her.) Excuse me, my lovely girl; you are the only part of the family I leave with reluctance. But to be plain with you, the difference of our birth, fortune, and education, makes an honourable connexion impossible; and I can never harbour a thought of seducing simplicity that trusted in my honour, of bringing ruin upon one whose only fault was being too lovely.