DEAR ABBY: My husband, “Charlie,” and I have been married for seven years. We are in our mid-60s. This is the second marriage for both of us. He was widowed some years before we met. We have a good marriage. He is sweet and caring, but one issue causes friction between us. It’s about letters he and his late wife exchanged. They were high school sweethearts. She kept all the letters he sent her when he was away in college, and after she died, he wanted to keep them. It bothers me that he’s still attached to them. Whenever we talk ...