When I was 12 years old I moved into another school where I saw this awesome girl which I totally fell in love with... And now I'm a senior in high school and still think about her ... Could she be the love of my life ???even though the only thing I have ever told her is :"do u have an extra pencil ?" And thats it ... So why I'm I still in love with her ???!!!

Anyways, it's totally normal. It could be a fantasy, an obssesion. It isn't healthy to like someone and not even try to ask her aout. While she gets tons of dates, you what. Think about her? You need to have your own life. And if you really feel you love her, just.. go for it!
I also think you should try to define your feelings and try it with other girls, to see if somone catch your interest. good luck ;)