Childish Dad Goes to his High School Reunion

Taking place in July of 2021, Dave's high school 15-year class reunion was rescheduled a year later than originally planned. As you know, Dave didn't finish high school. But Catherine decides it's a good idea to attend the reunion since Dave still has friends from his graduating class. However, Dave doesn't want to attend since he still has bad memories of when he was made fun of. How will he behave at the reunion?