You are in the same boat as alot of us Woog.. wanting something we cant have, feeling lonely, tired, missing what could have been. I do relate to how you feel and how frustrating it is.
I envy you a bit in knowing you dont want your ex back at least! But we are all in a state of flux and loss and wanting that elusive something more, to get back to a state of happiness. And all the distractions in the world (if we could motivate ourselves to be distracted) dont make a difference. Yes, it is funny how life turns out.
Unfortunately, as my very experienced and well educated psychotherapist told me.. its just time.
My Mum told me that! Grr. We are stuck right now, but however things shake out, it wont be this bad forever (although some reports suggest it wont really be alright, until Saturn gets off Uranus, and Jupiter moves into Pisces...by late 2009, even early 2010!) But feel free to ignore me, as that is a little discouraging.