Well yesterday was almost a very bad day... There are few things I do that push her over the edge, and yesterday I infringed on another one of them, totally unrelated to this issue.
She was pissed and divorced seemed completely imminent. I didn't even really fight or try to reason with her because I felt I had completely broken all trust. We were also short for time because she had to leave for a funeral service, so while she was out, I ran around, bought a sorry card, the nicest bouquet of flowers I've ever seen, some chocolates, and a whole bunch of specialty nuts she bought for herself that I previously devoured (this is what she was upset about). She came home and all was forgotten... Well not quite, but there's no plans of divorce anymore. I just need to be more respectful around the house...
I went a bit off track, but anyways, in the sorry card, I mentioned pretty much everything I said here, and reaffirmed it vocally after she read it. She cried, we hugged, I made a joke about my incompetence, she laughed and smiled and things are better.
I do think it's time for a break from TB, while I'm not at home anyway. I'll likely take up practicing in the mornings before she wakes up and re-adjust my schedule so it doesn't conflict so much with times where we're both available to do things together. I don't want to give up playing, and despite how it sounds, she doesn't want me to either. The problem was that I was spending no time with her whatsoever. I'd literally come home, eat dinner and talk with her for 20 minutes, and then hide in my music room with headphones on for 4 hours every weeknight, and weekends were a lot worse. She wants me to keep playing bass. She knows it makes me happy and all of that, she just doesn't want to be completely ignored. Some balance is certainly in order.
Thanks everyone for all of your help! It has helped me more than you can all imagine.