DEAR ABBY: It seems I am a human landfill into which people dump their trauma. I’m not sure how this happened. It started three years ago, when an estranged friend called me and talked for more than an hour about what had led to him getting fired from his job. I was touched that he had reached out, and I expected us to resume our friendship, but he wasn’t interested in much more communication. Later, a work acquaintance invited me to lunch and began unloading the awful trauma she had endured 40 years ago. It was a one-way conversation, with not even enough pause for me to politely reaffirm wha…