Quote Originally Posted by TheOriginalGrumpySpy View Post
Precisely, everything you know or discover in a dream is something you've already known.
(or made up as a fantasy.)

seriously, this cannot be reinforced enough. the relation to the OP's position is more important than the metaphysics (heh) of dreams, and the most important thing for him to hear and tell himself is that this girl is never going to return his feelings and he needs to move on.