Should I Fill These Nasolabial Folds, or Should I Wait a Few Years? I Am 27 Years Old. (photo)

You are right, it is your bone structure.  Your have a narrow face and your cheekbones are flat and narrow.  Cheek implants can help with that but you may not like the change and they are infamous for looking fake.  They first thing to do is to try a temporary filler like Juvederm or perlane in the cheek bone area, not the folds.  Putting it into the folds just adds volume and weight to the central face, not your cheek bones.  If you like the look of the temporary filler, you can go for something more long lasting.  My preference is transfer of your own fat. 

If you start now, you can actually prevent these folds from getting worse and encourage the production of your own collagen along the way, which would have longterm positive effects for your appearance. 

I agree with the others who feel that the best way to fix this is to add volume to the mid-cheek. Not only will you soften the NLF but you will augment your cheeks. I would choose Radiesse or Perlane for this.