Words not spoken .

Have you ever thought over for a moment that when was the last time you said to your mom/dad/sis/bro/friend etc " I love you." For most of us it might be difficult, we might have said the same to somebody else, like about you family to your friend. But never straight to the person. Some of us might not have given a thought also,that if it ever needs to be spoken.
Why is it so,why is it so difficult or what makes it so.The only resons i could find were because people think these words were trivial, or self-implied or just for no reason at all . They never thought that they have to say such words.
lets take for example when your sister/brother is going for studies or any other venture to some distant place .You are there to say good bye wish him/her luck and pray for his well being. The heart is pounding palpitations are slightly faster than normal, some kind of an aura of sadness surrounds for no reason you can make out and the last thing that happens is you never utter the words "good-bye," you are speechless and only wave your hand and the eyes do the rest.
A guy would rarely go to a girl and say you look beautiful, if he says that there is a sense of flirting, but if he keeps mum and only the look would do it all.
There are many examples and even more situations where we have kept quiet. I personally feel this is because when the emotions are intense words can never do justice to the expression but its the silence with the look the gaze the eyes that say it all. The great people say when the body is unable to contain the emotions, it is important to speak out.But i feel the speech will only make the expression trivial only 10% (or a little more) of what you feel can be put forth by way of speech.
ill try and put down certain situations briefly where you just think if you did the same..
1) going away far off for the first time you never said good bye only waved full of emotions...
2) never said anything when you were kissed for the first time ( if not forcibly) .
3) never said that heys i love you a lot to your loved one just kept quiet or just shook your head.
4) When caught guilty of a crime you never uttered a word in acceptance but only lowered your eyes.
5) when bereaved of a loved one (a person very very close) you never went out howling , just stayed there staring at the body and tears trickling down your cheeks..
6) when you achieved something or some event that was a big achievement that made you extremely happy you never uttered anything more than "thanks" for the applause, just stayed there amidst the crowd without reactions,blank.
These and many other situations are there that show that the things spoken are not what matter , rather they are not the ones that define turning moments. Its the time when you didnt or rather you couldnt speak that had a impact on your life. That brought about these changes in you. That made you what you are today.