Hi bigfish.
I just wanted to reply because in September I also went through a bad patch. Someone very close to me died, and I found out one of my parents has cancer and doesn't have long to live. So I kind of know what you're going through. I too lost my sex drive, and worried about what my husband might think of me. I ended up turning to erotic fiction, just reading was great for taking my mind off things, and because it was sexual literature it helped me get back my sex drive. I know everyone is totally different, and this might not work for you as well as it has for me. You could always have a look in the erotic fiction section of the forum and have a read and see if it helps, but if not, it's no pressure.
You say you're worried about your wife, and I understand that it's hard to talk. I'm also like my dad and as soon as a problem arises I cut off everything. I went for two months not speaking to my best friend, because I didn't want her to pity me, and felt like she wouldn't understand what I was going through. I didn't want to talk to my husband about it, because he hasn't had a major death in his family and wouldn't understand my pain. So I just shut off my emotions from everyone and let them eat away at me, and it got worse and worse. The best thing that helped me was talking to a friend who's parent died of cancer, and it was so comforting to talk to someone who had been through what I was going through. I know it can be awkward to break the silence on the matter, but have you thought of writing a letter to your wife, or even an email? Just to reassure her that you're still attracted to her, but you're going through a rough time. I do think you're on the road to recovery, otherwise you wouldn't have posted on the forum for advice, I think you're doing the right thing and taking the right steps to recovery.
One thing that helped me was thinking of my grandad, who I lost. He always said he had a wonderful life and couldn't have wished for a better one. His kids and grand kids have made him proud. He used to say "if I dropped down dead tomorrow I would die happy". I knew that he wouldn't have wanted this depressive state for me, I was his youngest grandchild, his baby, and it would have made him so sad knowing that his passing had such an effect on me. Life is short, and everyone has their time. We're all in a line waiting to go, some people push to the front, and others sneak to the back. It's a terrible thing to have to go through, but time really does heal and I know you'll feel better soon.
I wish you the best of luck, it genuinely makes me sad knowing what you're going through, and I wish we were all immune to grief, but it just shows how much you cared, and that's nothing to be ashamed of. I'm sure your wife will be happy supporting you, I know that I would if it was my husband.
Take care, and force yourself to smile for 15 seconds a day, it really makes you feel that tiny bit better :)