Again, deadboy, I know exactly what you're feeling like. I still feel tired a lot lately but I have made significant improvements over the past two weeks - the depersonalization feeling is almost completely gone. I bought a gym membership and have started going on a regular basis, my ball league started up so I've been socializing and playing ball regularly, and I walk places rather than drive (also saves on the wallet since gas prices are so high).
I urge you to get more active. I am not currently working and always have to find something to do to occupy my time otherwise I sit at the computer for hours on end doing nothing and almost fall asleep. I recommend you try to get on a regular sleep pattern as well.
Good luck and if you ever want to chat, feel free to to instant message me.