Ever have one of those days?

Or maybe I should say one of those lives?  Technically nothing happened one way or the other today.  Yet here I sit crying and so sad and alone and feeling like life sucks and it will just never get any better.  I am so tired and scared and just sick of trying and feeling like I am not getting to where I want to be.  That I will never get to have any of my dreams come true.  The day David went into the hospital my world ended and I just feel like I will never get to be happy again, truly happy.  I just am feeling so lost and alone and just want to be with David because even at it's worse as long as I was with David everything was okay and now that he is gone how can it ever be okay again?  I miss him so much, it's unbearable.  I would never wish this feeling on my worst enemy because it is just all consuming.  I don't know what to do.