I'm in a somewhat similar situation in that I'm in therapy and my husband is not (for the most part). I think it does make things difficult when one party is changing and growing and the other is not.

I decided from day 1 not to mention my therapist or my therapy much when I'm at home. For whatever this is worth, I recommend this. I'm sure if I talked about my therapist as much as I think about him (all the time) my husband would be hurt by it. Actually I've gone out of my way to downplay his importance to me... recently for example I told my husband I thought a large part of why I even needed therapy was just to have someone that would talk to me. This is partially true, although my therapist is anything but "just someone" to me. But, since I said this I've noticed a small improvement in my husband initiating conversations. When I'm angry with my therapist I've brought that up with my husband as well. I guess the point being I don't want my husband to feel threatened or outdone by my therapist.

I'm not sure it's good therapeutic practice for a therapist to weigh in on whether your relationship is "good" or "bad." Mine certainly hasn't. There are aspects of my marriage that are good and aspects that aren't so great. I think my therapist would support me if I decided to divorce, and he would support me if I decided to keep working on things.