basically, to overcome it you have to tell her you like her, and once she either breaks the news that she doesn't want to be with u then you will realize that she's not for you (it has happened to me before), however she may tell you that she returns the feelings for you and may decide to leave her long distance relationship (this has also happened to me, and im in a relationship for 5 years, soon to marry)
If u think she likes u then she probably does, because girls like to hide their emotions, if you are straight to the point to her she'll express her feelings and u'll get uck