Buddy,
I've been there.... I know how terrible it is...
Weather it be a lifting funk, or some sort of funk in your life; these things come and go....
I've had depression problems, I've thought I was sick of training...
I think I've been through it all... like everybody else here says.. either go in and hammer the weights.. or take a week or two off...
Maybe come up with a new and exciting training regime. Watch some WWF, watch some UFC, watch some Mr. Olympia, watch some pumping iron... watch them all...
I know you will get over it... And we are all gunna smash the 200 lb mark together!
Now go eat buddy! The fridge is calling you!