DEAR HARRIETTE: I got together with my ex after being apart for nearly 30 years. We had two good years together, but then he went back to his old ways. He started lying and not following through on promises. It is so sad and disappointing, but I feel like I have given him every chance I could. I can't trust him anymore. That's why we broke up in the first place. He has been so hopeful, though, tha…