how hard is it to say goodBye....?

Its only natural in the revolving life cycle nothing stays still, be it love or time. Given that understanding and wisdom, why does it make us sad when we break-up, or a friend turns foe or someone you like/adore decides to move on?

Is it possible to say goodbye with no pretense? I mean can we ever say bye and move-on like nothing happened? or nothing valuable has gone missing? May be its possible, yet we don't want to learn that art. Because its the 'heart of the matter'.

Should I then ask 'Why do i need to forget?'. Can someone not fill in that space? Can someone not give that special emotion/attention? Can someone not love the way he/she did? I am sure those special moments can be re-lived yet never recreated. Those special spaces can be filled not filled within. May be we don't want to be hit by guilt, by embracing the new love while there is a special memory of earlier moments are clinging refusing to die within. May be I want to be loyal and guilt free.....may be I don't stray deep within...may be I don't want to be guilty of infidelity....and that is why I want to forget.

I know its difficult...but at least I can try. For its the 'heart of the matter'