Filled in the blank

Like a questioner, there's a part missing
Like a questioner, need something to filled so its could be a perfect match
Like a questioner, need a right answer to make it correct

As a human, we created to live to help each other
And also like a questioner which asked us to filled in the blank
Nowadays, i still doesn't find the correct answer to filled
But i still have them as the best answer to filled my blank life
Them, yes them.. My best friend