Should I be glad I didn't waste my money on a halloween costume?
Maybe. Why do you think it would have been a waste?
Because I didn't go out and do anything for the holidays.
Holidays are fun to celebrate, but saving money is even better. There are lots of ways to make costumes without spending, and it's good you look to the future instead of going broke just for one night.
I was supposed to go to raves and drink lots of alcohol but never went. It's not like I care about tradition.
Then it is a good thing you didn't spend money on a costume. It is good to consider the expense and whether it is worth it before making a purchase.