DEAR AMY: My husband, “Don,” battled substance abuse and addictions, major depression, anxiety, and severe sleep apnea. Don and I also had relationship issues, much like any other married couple after 20 years of marriage. One day this past April, I learned that Don had once again stolen my legally prescribed pain medication. I became angry with him, said harsh words, and then I asked him to pack his belongings and leave. Instead, that day, he took his own life. I called 911 and they walked me through CPR. In the end, I could not save him. He had shot himself. This is all still quite fresh to …