Awww, you little romantic! Planning out your game for Valentines Day already! 12 isn't that young, she shouldn't take it in a bad way, it's perfect, I am sure she will love it. It doesn't screw up a friendship because you're not taking it too far to go all the way to the mouth. She will be left wondering if you have a crush on her or not, but that's the beauty of it, it could be just friendly, or could be sexy, she will never know, but i assure you, she will give it a lot of thought.