"Honey, you might just be staring down the barrel of greatness. So try to stay open to it. Don't go closing any doors on yourself." Translate: Your talent might allow you to become an amazing and successful musician. Don't stay here/go to college with Adam at the expense of your future.
Is she dreaming or in some ghost-like state all the time after the car crash watching her future? Also, I'm predicting in the end he gives an organ to save her maybe, just guessing :)
