Depression

People who suffer from depression are always asking themselves why anyone should love them. They often feel entitled to respect, to awe, or to admiration; but as for love, that is too much to expect. Many depressives only feel lovable insofar as they have some achievement to their credit, or have given another person so much that they feel entitled to a return. The idea that anyone might give him love just because he is himself is foreign to the person of depressive temperament.
—Anthony Storr, Churchill’s Black Dog, Kafka’s Mice, Ballantine Books, New York, 1990, p.24.