Forget about her or try harder?

There is a girl who kinda notices but not that much and she is my DREAM GIRL .. i start to lose faith but then i have 3 dreams about her, and every time i have a dream about a girl she turns out to like me...(it has happened 5 times each time with a different girl) so should i take granite of this and try harder ,or do i just give up on her?If so how should i forget about her?