Hi Farah,
Sorry, I'm a surgical patient as well, and can tell you that I went through a long period of taking things literally rather than being intuitive about them, which led to a multitude of misunderstandings. I finally went on Prozac as well because of the anxiety attacks I was having....I hit a real low point at about this stage that your husband is in after my surgery. My guess is that you went into practical mode because you knew he was worried enough for the both of you about his surgery, and you wanted to be strong for him....that's what my boyfriend did. After surgery, you feel different, you don't feel normal, and I think it would be easy to push people away because of the way you feel...it takes a long while before intimacy comes back into the picture, and especially if someone had a strong personality, it can leave you lacking confidence. Professional help and medication aside, I think the best loving thing my boyfriend does is constantly assist me...automatically walks on my good side, gives a hand if I wobble, and makes me feel safe out there in a world that I'm relearning. He doesn't understand it, but he notices and that means the world to me.
Recently, I've been touting Suzy Becker's book "I had brain surgery, what's your excuse", but I really think that's the best way for someone to understand what it feels like to have your brain opened. Even if you have a good outcome, it's a big deal.
Feel free to send me a personal message, I'd be happy to talk to you guys. It's a shame it's, to him, at "make or break", and I'm wondering if he's just pushing you away on purpose because he's "not who he was before surgery", and he doesn't think he deserves you, or that you deserve someone "normal".