My husband of many years quit drinking 20 years ago. About seven years ago, he became addicted to cough medicine. He got sober again. Now, three times in the past year, I’ve caught him using again. I feel betrayed and lied to, although he says he never promised not to. We had plans to retire in four years and enjoy our lives together, but now I don’t know what to do. I understand the economic realities of divorce on middle-aged women, but I don’t feel I can live my life wondering when the next time I’ll catch him using is. I am at a loss for how to proceed.