I just think you're going through a little rough patch man. I had this myself lately, I didn't get injured but I moved into my first house & started a new semester on top of working full time... so it's been hard for me to get motivated enough to make the 20 min drive to my gym. So what I did was had friends who take BJJ classes come over to my house, and get rolling like that. We've been watching instructionals & pretty much self teaching. This is much more convenient, loose, and cheaper.
Maybe you should try something like that, but I wouldn't want you to throw away all your hard work. Remember what your goals were when you set out for this, but don't push yourself into doing something you don't have the drive for anymore. I have faith you'll be back on the mats when the time is right for you.
"People say that marijuana is going to hurt my career. I say to them that on the contrary, my fight career is getting in the way of my marijuana smoking." Nick Diaz
Fav fighters: Hendo, Franklin, Shogun, Jeff Curran, Thiago Silva (future LHW champ 5/31/07), The Diaz Brothers