If it was your last day!!!!!!!!!!!!!

i have often heard of "live life as if it is your last day on Earth"
i never gave much thought to it.because i hardly could digest it. Guess Flow of life compelled much thinking over it.
I have been having quite a few last day's i.e last working day at coll,last exam,last get together,last birthday celebration together etc.
And as each last day passes on i have a strange desire to tightly hold it back and long before i know it is gone. A part of me dies with each end i see.
There is an extreme desire,obsession to go back and stay right in the middle of it.
maybe all this is because of good things coming to an end or maybe i am just too scared of new beginnings.....
The new start is hopeful and i even know that life will eventually fall into place.a lot of good things may also come out of it and besides my optimism doesn't allow me to have a gloomy picture for too long.so i know i would survive
but leaving behind every single thing that was so dear to you, that so very well defined you is a tough thing i guess
the countdown to leave the place where your heart lies is a complete agony....