I just don't know WHY..

Plz. tell.. 

Basically I play with words, 

but these days, words are playing with me.

I know what is happening,

but, I just don't know why.

life seems to be happier than before,

but i don't have any interest,

so many are my friends,

but, I don't know the one, whom i can trust.

Every one seems to know the problem,

but pretends to have no knowledge.

I am a bit depressed,

I know whats happening,

but I just don't know WHY?