If you think you really have Lyme, then I don't see why you hang around the boards. Just go get it cured and get on with your life.
If you're saying you've taken all the antibiotics that might possibly be considered worth trying, and you still have symptoms, but you cannot show you have Lyme by culture or PCR (only antibodies by blot/elisa), then I am very much unconvinced you have Lyme at all. That sounds like a post-Lyme syndrome to me.
Antibodies are lousy at distinguishing past from current infection. With some viruses, you know it's current, since the course is always lifelong (e.g. herpes viruses, probably hiv, etc.) With a bacteria that we know can, at least sometimes, be cleared (I think we all agree to that), the antibody test only shows exposure, not current infection. Lack of efficacy of antibiotics could be explained by resistance, but is more likely explained by lack of infection. Increasing titers do not show active infection or reactivation either. If you get a vaccine, you'll show increases in titers to everything. There have been studies done that showed you can treat HSV-1/2 infections by giving people repeated smallpox vaccines (obviously, a while ago!) - and that it lowers the rate of outbreaks. The viruses are unrelated - so it's not cross-reaction. Instead, it's a general phenomenon of immune activation to everything. It would similarly reduce the chances of getting shingles from latent VZV and even serve as a booster for other vaccines that might be wearing off. (Not a substitute for a true booster - the effect is not nearly as strong as a vaccine for the actual pathogen.)
The fact that chronic/post Lyme looks so much like ME suggests it's more of a final common pathway that alters the body's immune function in general rather than ongoing infection. If these were all ongoing infections, they'd all look different. HIV, HCV, untreated leprosy, and untreated syphilis, for example, do not look similar at all. Reactive arthritis, whether caused by enteric or chlamydial infection, looks the same long term. GBS, whether caused by campylobacter or CMV, also looks pretty much the same (and one of those is curable, whereas the other is lifelong). Chronicity of the inciting agent does not correlate with chronicity of the GBS.
If you're saying you've taken all the antibiotics that might possibly be considered worth trying, and you still have symptoms, but you cannot show you have Lyme by culture or PCR (only antibodies by blot/elisa), then I am very much unconvinced you have Lyme at all. That sounds like a post-Lyme syndrome to me.
Antibodies are lousy at distinguishing past from current infection. With some viruses, you know it's current, since the course is always lifelong (e.g. herpes viruses, probably hiv, etc.) With a bacteria that we know can, at least sometimes, be cleared (I think we all agree to that), the antibody test only shows exposure, not current infection. Lack of efficacy of antibiotics could be explained by resistance, but is more likely explained by lack of infection. Increasing titers do not show active infection or reactivation either. If you get a vaccine, you'll show increases in titers to everything. There have been studies done that showed you can treat HSV-1/2 infections by giving people repeated smallpox vaccines (obviously, a while ago!) - and that it lowers the rate of outbreaks. The viruses are unrelated - so it's not cross-reaction. Instead, it's a general phenomenon of immune activation to everything. It would similarly reduce the chances of getting shingles from latent VZV and even serve as a booster for other vaccines that might be wearing off. (Not a substitute for a true booster - the effect is not nearly as strong as a vaccine for the actual pathogen.)
The fact that chronic/post Lyme looks so much like ME suggests it's more of a final common pathway that alters the body's immune function in general rather than ongoing infection. If these were all ongoing infections, they'd all look different. HIV, HCV, untreated leprosy, and untreated syphilis, for example, do not look similar at all. Reactive arthritis, whether caused by enteric or chlamydial infection, looks the same long term. GBS, whether caused by campylobacter or CMV, also looks pretty much the same (and one of those is curable, whereas the other is lifelong). Chronicity of the inciting agent does not correlate with chronicity of the GBS.