I like a girl and i don't know how she fall inlove to me ?
I believe that in such situations it is necessary to act immediately. No need to wait until she takes the first step, it should always be you. After that, everything will be fine if you approach each other.
Don't say that everything will be fine because sometimes, the girl you like just isn't into you. In cases like this, don't force it. Better to get thr girl's friendship than animosity lol. But if you were given chances to be with here then don't waste it. I think there will be hints if the girl is interested. You have to be really keen in spotting those hints.