I am sorry to hear this. My Filou has CRF now for over 4 years- and he survives, thanks to weekly sub-q fluids. It was diagnosed first when he was 9 and now he will be 14 in a months time.
But we were lucky to diagnose it early when the urea level was not as high as it may be now.
There are excellent websites out there:
http://www.felinecrf.com/

http://www.felinecrf.org/

In both you can see what the options are. The main thing is to get Blackie over the crisis right now. His levels may go down again and then you may be able to set up a regular routine.
Filou the little fighter sends purrs to Blackie.