Most Helpful Girl
First off, taking his opinion into account is very nice of you, but if you really want to dye your hair or get a piercing, do it.
I think dying your hair a shade or two darker or lighter can make a big difference, but will still be the naturalness your man is looking for.
Plus, there's alway makeup, and when you're around him you can go for the more natural look with makeup.
Also just changing your wardrobe a little might make you less bored, even just new accessories can help.