I think the only reason you put this thread forward because you have a crush on someone and you are not able to console her or don't have the strenght to talk to her.But she is not going off your mind and you need a way to expell her out of you.
Well then I should tell you Its really hard to hate a crush.We all are made that way.Most of the answers above are just trolls.The more you run away from the more she will get into your mind so stop this right away.
Just try to be brave and go and talk to her.You will soon find she did'nt deserved a goddish title that you gave to her in your mind and thing will soon be like before.
And if you are not able or not in a position to do so then just leave everything on time.Take her normally the more you force yourself to stop thinking about her, the more you will end up doing opposite of so.lol...