What metaphors are used in Love Story by Erich Segal?

Money is an underlying metaphor and theme in this novel as having it or not having it sets the many characters apart from one another. Oliver is the child of a very wealthy family. Oliver has always had money and would more than likely be lost without it. However, Oliver quickly finds out how difficult not having money can be when his father cuts him out of the family wealth, when he decides to marry Jenny against his father's wishes.