The abscess in your breast should be lanced and drained.But if your infection keeps coming back after incision and drainage, a wide excision of the infected area may help. Has your doctor made a culture of the infecting organism? If not,then it should be done so that a proper antibiotic treatment can be focused on the offending organism.
It is also possible that your infection keeps coming back because you have some other illness which could affect your immune system, such as diabetes. In this case, the systemic illness has to be controlled before the infection will heal properly.
I think that if you are dissatisfied with your present doctor (as you have mentioned in your profile page) I would advise you to consult with a Breast Surgeon or a Dermatologist to obtain better care concerning this abscess in your breast.