As for your problem about being able to talk to her when you were friends, but not able to talk to her now... don't think that a relationship changes the conversation. It's not like your talking changes suddenly after you make that transition from friend to more. I believe that the connection comes through the verbal (and body) communication. If you feel awkward when with her now that you're in a relationship, there's something wrong. I know that you haven't been in a real relationship, but think of it as 'maybe this will be the time I will have that relationship'. Don't become a self-fulfilling prophecy. If you haven't had a gf yet, consciously try to not be awkward around her... doing that will make sure you won't have one.
If a dream comes true... then is it still a dream?