give a surprice party for her..
arrange few of her friends and ur friends in a restaurent(excel world, or splash)
ask them to have a cake with her name on it..
with handwritten her name and age.
u go there with her as nothing knows...
have a little party with snaps..take a framed photograph of her(without the glass) and ask all friends to sign on it around probably with a felt pen.with a wish..
with ur wish as well...
give a small gift as a pendant..dont bother abt gold..
it will her most romantic day of the life.............