I don't know what to say bro, I had bursitis in my left shoulder and it did go away, just took a shitload of time to do so. Mine would come and hurt for a few weeks, then leave for a few months and come back for a few weeks, then I wouldn't feel anything for a few months etc. It came back about 5 or 6 times over a two year period. This was really annoying, as you can imagine.
The thing that helped me was increasing flexibility. It helped loosen up the joint. Maybe you could take a short cycle of anavar? It will help you gain strength back at least. Glutamine also might help, at about 10 grams before bedtime. Glucosamine/MSM/chodroitin are also good, but don't expect anything miraculous from them...