Dear Prudence,
While in high school, I was hiding a pretty tumultuous home life, including homelessness and living out of my car. As a result, I was pretty shy in big groups, and now that I think back, quite rude to potential new friends—think showing up at small house parties and completely ignoring the host or lying to people who wanted to be closer. I realize this was a long time ago, but as my high school reunion comes up, I feel compelled to explain myself and apologize for my behavior. I’m sure it’s not as memorable as I think, but I genuinely feel guilty about people I may have made such a horrible impression on. I know now that there is no excuse for being such a rude person, and I feel bad. Would it be out of line to re-introduce myself with an apology and explanation, or should I just pretend like it never happened?
—Explanations Owed