I'm 15, too, and I first saw FotR in the theaters when I was 13. I have to admit that at first, I was a squealing fangirl-type. (I know your shame, Lhunardawen!) But then I saw it a couple more times, and I found the books in my basement. I began reading the Fellowship, and I became more educated in Tolkien's works. By the time the Extended Edition rolled around, I was hooked. In a good way.
P.S. Oh, happy day! I found The Hobbit in my basement this afternoon!