Talk to your doctor! Some SSRI's might help. Do you have a history of depression?
Do you exercise? Have a social life with non-users? Eat well? Get enough sunshine? I find fish oil helpful for my depression, too.
I guess I'm asking if you have things in your life to be happy about
Do you fee like you CAN'T enjoy things that should be enjoyable? Or are you just stuck in that zone where you're not using but you're not living, either? I guess the two aren't mutally exclusive... just I've done both and I know they are rotten places to be