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tori0718, I don't blame you. Dealing with a sufferer is not easy, and it's not something you asked for.
As far as his response goes, that could be something we refer to as dissociation, where a part of our brain basically disconnects us from reality is some capacity as a defense mechanism. It's happened to me many times where people might expect you to be more upset. Recently a cousin passed away from cancer and when I told my girlfriend about it after getting off the phone with my aunt I was matter-of-fact and not very upset, just a minor feeling of "blah". I could tell she wanted to comfort me and was confused that I wasn't really upset:
"Are you okay?"
"Yeah, I'm fine. It just sucks."
It's just as confusing being on our side of that fence. Three days later, while driving to work it crossed my mind again and I cried for 20 minutes in the car, partly because she died, and partly because I'm so sick of not being able to have an emotional reaction to difficult things when it would help (i.e. when my girlfriend was there to comfort me).
I tell you all that so you know he's not "cold hearted", you definitely upset him and he definitely cares. He just may not be totally aware of it yet.
Best of luck to you and I hope he gets better, he's got a long road ahead..
If you're interested, you can read more about dissociation on Wikipedia by looking for an article called "Dissociative disorder". I would link it but anti-spam won't let me.