Help!

Still flummoxed as to what can end this horror of a cat turned mean and unpredictable with new arrival of kitten. Growl and hiss and attack; growl at me and it constantly.  I can't get into his empty brain, but I can say I have lost my 'love' for him. What is to be done but wait and suffer something that psychologically devastates my life. No it's is not better to have loved and lost than to never have loved at all.