Sooner or later, your high school reunion will creep up on you. Time is a fast circle.
Whether it's a Facebook invite or a real-life piece of mail sent to your parent's house, knowing you've been out of high school for a whole decade (or more) and that you're expected to attend a party celebrating your march from adolescence to decrepitude can get emotional.
But if you know what feelings and reactions to look out for, you can get through it.