I will be perfectly honest, I would not consider any surgical procedure that wasn't absolutely essential for my health, but that's just me I know. But as a diabetic, if not perfectly controlled you may be slower to heal and more likely to scar. And every op has risks, even cosmetic surgery. Also, I have seen a great many breasts in my lifetime and breast implants, viewed naked, are as often as not a disaster, with bad scarring around the nipples, nipples looking cross eyed, not level, and lying down breasts with implants look totally un-natural like they've been plonked there like a sand pie!
Learn to love the breasts you've got, get yourself to Bare Oaks Family Naturist Park and learn to love your body! That's my advice.