Well I am bipolar and I can let you know how we have a successful marriage, not sure if it is appropriate for you of course.
I do not discuss my t or pdoc appts with him. I do not expect him to be my therapist. If I am not feeling well and he asks I will say ok, or I've had better days. That's it.
If I need support I go to support group, but do not discuss that either, I just go if I need to. If I feel suicidal I call pdoc or help line, or talk to other bps about it.
Sounds like your wife is pretty annoyed so maybe not mentioning it for a while may help.
Sounds like you take your marriage very seriously, I hope she appreciates that.