You feel, I suppose, that, in losing Isabella, you lose half yourself: you feel a void in your heart which nothing else can occupy.  Society is becoming irksome; and as for the amusements in which you were wont to share at Bath, the very idea of which without her is abhorrent.  You would not, for instance, now go to a ball for the world.  You feel that you have no longer any friend to whom you can speak with unreserve; on whose regard you can place dependence; or whose counsel, in any difficult, you could rely on.
Jane Austen, Northanger Abbey
friendship