Sisterly feelings

[tictac]

I never had a sister, and I've always wanted one. You know, someone who I can protect and all that melodramatic crap. Then I met this 13 year old girl, she's really short for her age, we're pretty much alike, we kinda dress the same way, its like I saw a female version of myself to her. The thing is we were never really close, we hang out in the same group, had some little conversations, but thats all about it. She's a really interesting person and as time goes I see myself wanting to know more about her. I kinda feel that she wants to know me more as well, I also find myself thrilled when she dropped me simple 'hey' on facebook. I dunno, I know this is not a romantic feeling in anyway, I'm 17. But I feel that my longing for a little sister has something to do with it. It makes me feel awkward about myself, what should I do about this? I want it gone.