Sounds more like burn-out at this point. Try a related, but different job if you can get it.
I moved from straight up developer to a technology analyst to sales to product management (with some minor development) roles and this kind of movement has really helped keep things fresh. It also didn't hurt that I cycled between huge mega-corps and small companies -- each have radically different environments with their own pluses and minuses. Stay until you get tired of the minuses of one, then jump to the other.
One nice thing about my particular moves is that I've dragged along entire skillsets from my previous guises that most people in that field don't have while learning new ones from that job that I can then carry forward. It's amazing what kinds of old skills I never thought I'd use anywhere else come up again and again, except nobody else sees the application in their domain because almost nobody who grew their entire career in that particular field has had any exposure to it.
(I remember the first time I taught regular expressions and production rules to a fellow analyst co-worker, once he "got it" his jaw just hit the floor. He now has carried that forward into another analyst job where, just by knowing that one simple thing, has revolutionized operations at his current employer for a large analysis program he works on.)