So its my girlfriends 16th on monday and i need to get her a special gift i need help?

i love my girlfriend so much ive bought her everything and im only 16 myself ive bought her a gold heart and a gold locket and give her cards and chocolate and money basically anything she wants but i need an idea what to get for her shes a pretty girl shes gunna be 16 and cares about everyone but herself so i need a present that shows how much i actually love her any idea's please help