Love is a four letter word

How do you say goodbye to someone you love, whom you have spent over three decades with?  How do you watch them waste away?  How do you say goodbye?  Why do you have to?  I do not think I can do it.  I do not want to say goodbye.  I am so angry at everyone and everything.  With God for not helping, with him for being sick, with myself because I cannot do anything...