Without the benefit of an examination or even photographs it is hard to answer you question. I will therefore have to give a guarded answer and say it may be possible to achieve some of your goals without a standard breast lift. I assume you are concerned about the extensive scars normally associated with the breast lift. These can be viewed in brochures and on the Internet. It is possible to reduce your areolar diameters and only have a scar at the peripheral margin of the areole. From this incision you can also obtain some lifting through a “donut” mastopexy.
If the differences between the breasts are not substantial, the symmetry in lengths can be improved as well. Regarding the differences in volume, if you wanted to avoid a breast reduction, one option might be to place a smaller implant in the side with the larger breast. Whether these are possible would depend on the extent of you condition. I would recommend a consultation with a board certified plastic surgeon to receive a more definitive answer to your question.
I hope this response is of some value to you. Good luck in your future treatment and surgery.