Confused

I'm really confused right now. There's this girl at my school that i can't get out of my mind. I don't feel like i like her...but still...i feel like there's something there. I talk about her enough. She enters my dreams quite frequently too. I know that she would never like a guy like me. Plus...I don't want to like her. I have a girlfriend already...and I think she is the one I could bear spending a whole lot more time with. But still...whenever i see this girl at school...it's like my heart...it just....let's call it an arrow, cupid's arrow. My heart feels like it gets pierced every time i see her. I don't know what's happening with this girl...but it's got to stop. If i didn't have a girlfriend i would consider actually pursuing this girl...but i just dont see that happening any time soon. Sometimes I wish I could just go live on an isolated mountain top and stay there by myself until the Lord comes back. But no...it's not meant to be...i guess i'll just have to suffer.