This market can really wear you down.  I know because it wears me down as well.  In the world of real estate, you must be persistant and know how to play the game.  I am with a client for about a year now and we have made multiple and numerous offers.  I am actually amazed at how my client is still willing to go for it.  The same goes for me.  I have to find that extra energy and positive outlook to keep plowing through the hard times (now). 
Don’t give up!!!