And in the end

And then again, I was overwhelmed with sadness.
You meet someone you knew, and you are happy.You are happy to know him again..to know that the face you remembered hasn't changed .. neither have the simple gestures like smiling in a unique way .
Then why was i sad? Why was i so dull in the end that i wanted to sit on a bench in a park,head down and not willing to speak to anyone? Why is it that I am not able to decipher most of my own moods?
I think people from my past remind me of the missing pieces of my heart ...and the agony is that of not knowing them well..or not getting time to do that ever..past ,present future..life is evanescent , but to have known people who could have been very close to you and not knowing them as much as you would have liked to gives you a strange pain .
I really don't know what this point is leading to ....