Please cry as much as you can. This grief only shows how much you love your brother. And how much the stupid JWs are to say things like that at his death bed... How rude of them, really really rude. They know nothing of fellow feeling just keeping to WTS made laws.
After your initial grief I hope you'll take time to write about your experience just to get your feelings straight. Stay angry at the religion that kills. These are sick masochistic bastards. I'm not in a believer in "time heals all wounds", rather time may distance you from your brothers death, but time will never heal the chasm left by his absence. 20 years ago my Mom died, I still grieve and miss her terribly.
I hate what those JWs did to you, I really hate them.