DYING INSIDE (Del Rey Books)
From the back cover:

David Selig is outwardly unimpressive.  His early promise as a student and scholar is unrealised.  He has no proper job, he has no girlfriend.  But, inside, Selig has the power of a god, for he can probe other people's minds and read their thoughts and feelings.  This extraordinary faculty defines his sense of self -- his power is *him*.  But with the onset of middle age, Selig's capacity to read minds is failing fast, and he must struggle to come to terms with that loss -- to accept that he is dying inside...
Fiction, general, Fiction in English, Fiction, Science Fiction, American Science fiction
Robert Silverberg
Robert Silverberg is an American author, best known for writing science fiction. He is a multiple winner of both the Hugo and Nebula Awards.

Silverberg received a Nebula award in 1986 for his novella Sailing to Byzantium, which takes its name from Yeats' poem; a Hugo in 1990 for Enter a Soldier. Later: Enter Another; and in 2004 he was named a Grand Master by the Science Fiction Writers of America.

([Source][1])


  [1]: http://en.wikipedia.org/wiki/Robert_Silverberg