I'm very depressed at this moment..what do I do now with this girl?

be practical.u can not be something to every body on earth.there might be girls who really like you but u do not have any feelings for them.it is quite natural.it happens.you must move on.this planet is full of girls.there may be some body who will love you more than her.and you will not be a weirdo for her for sure.good girls always respect guys who respect them.have some goals in life and work on them.getting attracted to some body is nothing more than a hormonal influence.keep it cool.you will definitely get better girls.but remember,you have only one life.make it or spoil it after a girl,its all upto you.