Need Help !!!!!

Have you ever felt as if all the sorrows of world can’t touch you?
Have you ever felt that whatever bad may happen to you, you would always keep smiling?
Has it happened to you that your friends want to give you their smile but what they find is that you have enough joy to lend others?
That is some kind of thing I have been feeling for quite some time now.
I laugh when people are tensed about me, I smile when people are crying about me and what I do is, I hide my wounds and try to heal those my friends.
Does that happen to you as well?
Someone has said that the meaning of happiness dies if it is not balanced by sadness, is it true? Am I really missing something? Do I really need to be sad?
I can be angry, I can be focused, I can be determined anytime I need, while cheerful I can be all the time. Do I need to have leash over the darker emotions as well?
Is this colorful life incomplete without blackness of disappointment, disgust and unhappiness?
Am I normal?
I liked a page on facebook which said the ones who are the strongest is the one most need of a hug.
Do I really need a hug? And if yes, then by whom?
Amongst all these confusions, I am asking your help to find the way out of reality…………