DEAR ABBY: I have three sisters who won’t come to visit me. I am older and their only brother. We are all in our 50s. We all get along great and have no issues. Seven years ago, I moved away from our hometown in Pennsylvania and bought houses in vacation towns in Colorado and Arizona. I would never see my sisters if I didn’t make the trip back home. The problem is, I have an injury that makes traveling very difficult. Over the last seven years, I have gone back twice. I have offered to pay gas or airfare for them ...