"I wish that I was good enough"when all people do is walk in and outta your life and you get used to it but it still hurts so bad.When you don't know who to trust anymore

Your good friend emma invited you to her 18-year-old cousin matt's birthday party. emma is a straight-a student who is also on the cheerleading squad. when you get to her cousin's house, you see that there are no adults there. emma's cousin hands her a beer. he then hands you a beer and says, "here, have one. i do it all the time, and i never get caught." what would you do?