Emotional Inertia

I never thought I will be able to write on such a vague topic as this but then I surprise myself(more often than not ..unpleasantly). As weird thoughts go I was just thinking that how much difference does death or separation of a very close companion/guardian makes to us. ... I mean separation as in permanent without any means of reconciliation.
I think at the time of separation(also in death) it shatters the world frame we live in. We find it hard to accept the simple fact that he/she is out of our lives and maybe wat we know as "life" will change forever for the worse. Be it love , infatuation or simple emotional attachment we find ourselves without an anchor.
But ... rather than being just foolhardy abt it have we given ourselves sum thought as to why such a thing happens...
For one i think it such happens because we like inertia. Emotional Inertia. We take comfort in knowing that we "know" this guy. We are secure that this "guy"(or gal) is sumtone who will not be heavy on our emotional resources. We built layers and layers of thoughts and actions in the sheer inertia of not moving out of our comfort zone. And the person also because of his/her inertia builds this shell. When this shell breaks ...its the breaking that discomforts us. We hate movement and its this loss of onertia of rest that unsettles us.
Secondly..have we ever given ourselves a thought ..how life changes for us when that person so special in our life moves away(again ..it cud be death or otherwise) . In 90% of cases that i have had a chance to see from close quarters..Life doesnt change. After the initial shock we settle back into the fabric of life as if nothing has happened. Drop a steel ball on a stretched rubber sheet. You will understand wat I am talkin about. A small perturbation..it doesnt break the rubber sheet and the ball also settles down to its own weight..again Emotional inertia rules .
Thirdly ..have we ever carefully observed how much of a difference our sorrow makes to the world. I wud say minimal. Not that our friends are cold and heartless creatures..but frankly it doesnt matter. Look at is this way. ... Suppose a family member close to u passes away. Apart from a few sympathetic words how does that shake up your best friends' life. It doesn't. Tomorrow his routine wont change ..he will get up ..brush , shave , have his breakfast and will perhaps give a few milliseconds to think abt ur tragedy..but life wont change a wee bit for him while u may be emotionally be damaged. Its not only him..Life wont change for any one else..be it ur uncle..aunt ..ur chowkidaar or the milkman. Again its not that they are too cold but its just that their Emotional Inertia is too heavy to feel a neighbor's perturbation.
Emotional Inertia cant be described as good bad or ugly..Its just there. We cant control it. But yes admitting it will make life a wee bit easier