Do I really have to buy an air freshener for my dorm room?
Why don't you want to buy an air freshener?
Because they're too pricey and I can't stand the chemical smell.
If you don't want to spend money on an air freshener and you don't like the smell then it is fine not to buy one. Instead you could open a window or light scented candles to freshen the air.
I don't know if I want to do that either.
I think it is fine not to like air fresheners but try to find some way to be considerate about the bathroom freshness.