My roommate smokes in our room, and it's making everything smell terrible. Isn’t that against the hostel rules? I'm not comfortable with it, but I don't want to cause drama or be a snitch but I don’t want to deal with this anymore. What’s the best way to handle this without getting into a huge fight?

My roommate smokes in our room, and it's making everything smell terrible. Isn’t that against the hostel rules? I'm not comfortable with it, but I don't want to cause drama or be a snitch but I don’t want to deal with this anymore. What’s the best way to handle this without getting into a huge fight?