How do you know when you yourself have reached the limits of what therapy has to offer the significant other in a mental health issue?

I've been in counseling for the past 8 years. Individual, marriage and support groups. Many therapists in the process. I've pretty much heard it all. I know my weak points, I know what to do for them. I've detached, set boundaries, stopped enabling, gotten on with me yadda yadda yadda.

So now what?

Lately my T and MC have both been uttering the same repetitive sentence. "You know.......what to say, what this means, what to do".

So is that it? I mean, yes I feel stronger in many ways....but my problems aren't solved. Maybe my expectations were too high. Then again, maybe this too is just another question that is answered with "You already know the answer".