In on the verge of turning 50 and an only child. My parents are going downhill rapidly. I run a small business, work 6 days a week and have a happy marriage. I've worked hard to build my life to where it is. I can see my parents taking more and more of my time, life and happiness. I'm feeling the need to pull back and define my boundaries. I feel it's my life vs. them. How do you preserve your own life while giving more and more to two old, negative people who are becoming people you don't even know?