You said that you're not taking medicine -- is this under doctor's orders, or did you just stop taking them? I only ask because I've heard that just cutting them out completely without tapering them off can be dangerous. In any case, I'd talk to your doctor and tell him that you're feeling much better without the meds and see about discontinuing them. (You don't need to be on them forever, after all.) The better you feel, the more likely you are to get out and enjoy life more. As you make connections, you'll probably start feeling even better. It's like an upward spiral.

On another note, did your doc prescribe Wellbutrin just for lack of energy? I'm curious.