Where's the Good in Goodbye?

How hard is it for you to say goodbye? How is the feeling of being left alone? Why do we need to say goodbye?
What does goodbye mean? Is it for real? Is there an easy way to say goodbye? Is it goodbye for now or goodbye forever? Should I be happy, should I be sad or should I wait for you to come back? Goodbye... such a lonely word....

Some quotes I got from the net:

• I didn't ask for it to be over, but then again, I never asked for it to begin. For that's the way it is with life, as some of the most beautiful days come completely by chance. But even the most beautiful days eventually have their sunsets.
• People so seldom say I love you and then it's either too late or love goes. So when I tell you I love you, it doesn't mean I know you'll never go, only that I wish you didn't have to.
• Yes I love him. I love him more than anything else in this world and there is nothing that I would like better than to hold on to him forever. But I know it's not for the best. So no matter how much my heart is going to break, I've got to let him go so he can know just how much I love him. Maybe if I'm lucky, he'll come back, but if not, I can make it through this.