Quoted from Ugly Betty:
I hate to say goodbye more than once, but everyone can say that. No matter how many times we did it, for good or worse, it still stinks.
Even we don't know what we giving up, we still have to move forward. What we can do is we can't always be afraid of the next goodbye because the chances are it will never stop.
The trick is to recognize that goodbye can be a good thing. It gives us a chance to start all over again.