DEAR ABBY: I am a 65-year-old active woman who still works. I play tennis several times a week and have a loving relationship with my kids. I know with certainty that I have many good things in my life. However, since my sister died last year, I have been having second thoughts about a lot of the decisions I have made over the years -- especially regarding relationships and my choice of jobs. I realize now that more than a few of my decisions were based on low self-esteem, although I don't come across that way.