DEAR ABBY: I’m a woman in my 50s and will be going to my high school reunion in a few months. I recently reconnected with one of my high school teachers, whom I greatly admired. (OK, I’ll admit I had a schoolgirl crush on him.) He is 10 years older, and we had a friendly relationship “back in the day” with extracurricular school activities (he was a sponsor) and even some outside socializing (dances and such), though there were no lines crossed as far as impropriety. We were both engaged to other people (who both happened to live a good ...