I don't like my mom
Why don't you like her?
She's declining rapidly in health these days and it's stressful to me
I'm sorry that's happening to her.  However, I think she needs you there no more than ever.  Family members should like and support eachother.
Her state makes me not want to be near her at all.
It may be hard but your mother really needs you right now more than ever. Think of how hurt she would be if she heard you say that. It will be difficult but you should try your best to be with your mom.