What made you decide to stay or go in a marriage?

I wish I knew a point blank answer that would help me decide after 32 years of marriage whether to stay or go. I hate change and that is probably why I have stayed married for 32 years. I keep thinking about the upheaval that a divorce will cause but I also think I don’t have a lot of years left and would I be happy divorced instead of just passing thru the days? Neither of us wants to answer that question.