This doesn't sound like a problem to me, maybe I'm wrong? You don't want to do anything illegal with her, or her with you. You have intense feelings of closeness, but recognize her true age, correct? Let her grow up, and if the feeling persists when she is an adult with more life experience, you may become more than friends--then again you may remain the best of friends for the rest of your lives. Anyone that touches you in this way-so deep, and accepting-is a blessing in my eyes...and you should cherish and protect them as much as you can. Enjoy this time with her as friends, and hope she doesn't 'grow out of it'. =)