We fall in love with the people who make us whole.
Or, more precisely but less quotably, we fall in love with people we see as having access to parts of life closed to us.
This, she thought, is what being in love is like. You can recognise it by the little cold ticking of calculation in your thoughts: perhaps I can change my life.
From Imposture by Benjamin Markovits, reviewed in “Suicidal Piston Device” by Susan Eilenberg, London Review of Books 5 April 2007