What happens when a relation breaks

I got the idea of this post when i myself got a pang in my heart yesterday while walking back home.
One of my close friend stays just a few buildings away from my place and i cross his home everyday while going to and fro to my home.
But we have lost contacts now...
Which made me think...
What happens when a relation breaks???
 What do we all go through or is it just a few like me who go through it and then there are others whose life goes on like normal???
When some treasured relations break (by relations i mean friendships and other form of relations except love affairs) like some long long friendships what do people go through.
 My 1st reaction ( and i think that's wht most of us should do, if you treasure the relation) is to try and save that relation from dying. If that's within your limits you should try to sort out your differences, but sometimes there are reasons and pains bigger than your love for your dear friend and then you feel like you have to let them go.....
Wellllllll,,,,, they do call cancerians emotional fools and so even after all the pain your heart goes through, me being a true cancerian hope against all hope that the saying
"if you love someone set themfree and if they are yours they would come back"
Comes true and initially wait for people to come.
Then comes a phase where you remember all the good times you have spent toghether and again your heart yearns for it and you question yourself that doesnt the other person of this broken friendship remember any of those moments... Again sobbing and retreating in your shell because there are no answers coming your way certainly not a positive answer from the other end.
Occasionally you would even loose self control and ping or message or put up a status update for that person on your fb,watsapp,gtalk and bbm etc. Hoping that he or she reads it and reacts.
Then comes a self realization phase where you finally decide that you have to pick yourself up alone as there is no hand coming from the other end...
So like a defeated baby you pick yourself and the broken pieces of your heart together and try living life forward. Convincing yourself that life moves on...( and at the back of your mind remembering saif ali khan's famous dialogue from the movie HUM TUM : no byes ria zindagi bohat badi hai which means the story hasnt ended yet for you and your friend.)
Then you continue living your life normally...many new people enter your life a few other old ones leave your life due to some human psychological or social differences suddenly springing up between you and them or due to death..................................
but...................
life starts running with the same madening pace that it used to once upon a time.

Also i have realised that in a city like mumbai how difficult it is to bump into someone when you badly wish to bump into him or her. Which makes you realise that in mumbai's life you only meet people when you remove time for them from your schedule. You cant bump into someone even if they stay few steps away from your home. Imagine how much time of your life you gave to someone earlier when you met them and spent time with them.
But as i said life goes on...
If old friends are not there anymore you hang out with new people,you laugh,you smile,go out,party,take pics with new people,occasionally even flirt with a few and life goes on day by day month by month....
And then one fine day like yesterday....
your memories play tricks with your heart; in return your heart fucks up your mind and again in return your mind gives u that burning sensation in your heart of all the amazing time spent with that special person and that long long friemdship. you miss that person's presence in your life because once upon a time there where a few promises made as mad teenagers which you believed to be true from your end...
A promise that you would be friends for life...