She was 100% correct on her high horse. As I said above, she showed interest in his hobbies and tried to share her interests in his hobbies, he clearly was too insecure about it, that's not her fault. If he couldn't be there on a very important day for her, he clearly should've broken up with her ages ago. It doesn't matter if they tried to keep distance, even if she wasn't a girlfriend but just a friend, once she asked you personally to be there on an important day, it was his job to suck up his insecurities for a few hours, instead he went fucking camping. Complete loser behaviour and everyone who is defending him is an even bigger loser.
Name calling just because someone disagrees with you, really?!? Did this touch a nerve because your dad didn’t go to your school play either? I think you’re too invested in this fiction.