Plan G, you have received wonderful advice here and it sounds like you're heading in the right direction. I'll tack mine on just to feel important and to hear myself talk... but if you read it, hopefully it helps
In my many experiences on both sides of your story, here's the end result....... If you're told to go away, go away and be happy she told you and didn't drag it out. I could say 10,000 words more and make it more poetic, but that's it. I think the movies make us think there's a romantic angle to these issues. Like you wanting to take champagne over. The movie's tell us that when you do that, you'll show her you care, she'll break down and tell you that she's just scared to love, you'll hold her and live happily everafter. It's not reality. When a person flips the switch in their head and wants to be done, they're done, and by talking, writing letters, and worrying about it, you're only wasting your time, hurting yourself, and making yourself look silly and like you have no other options which isn't attractive.
Never in your life when you've pictured the perfect relationship did it involve begging or talking a girl into liking you or staying with you. We've all done it, and almost all of us look back at those moments with disgust and hope we never do them again. The girl you should be with will like you from the beginning and will never tell you to go away.