I, too, was hung up on my ex for quite some time...
You just need to surround yourself with something to do. I chose to take out all my time for AF. Sure, I looked like a loser doing it :silly2: but it helped me sort things out by talking to others, meeting people, and talking about anything else... Now I'm in another relationship (which is going to move much slower--thank goodness) and I'm feeling pretty good about things. My ex and I can talk without feeling strain or desire (well, atleast I can). It can and will get better. Just keep ploughing on through and you'll be out of the tunnel in no time! :flash: