I believe that depression is among the correct responses to chronic pain. I am always surprised when those who identify themselves as being in the health care field of any sort act as though depression is an unusual or incorrect response that needs fixing. In my opinion, it is not. Any number of things that happen are depressing and to respond like some chirpy pollyanna would seem to be more a cause for concern than depressed.
But a group might help you socialize more or get out etc.