And yea, watching her drive away from the evening is hard to do, yet it isn't as hard as watching her drive off without plans of coming back now is it ???
Focus on what is good, rather than what is hard.
And while your past does not define your future, you cannot forget the road that you have taken to get to this point...
Live your changes, and strive EVERY DAY to be the person that attracted her once again...
Keep working on yourself, every day....
Your future is as bright, or as dim, as your actions dictate...