Absence

It is definitely missing. Something is definitely missing.
Yet, whatever That is missing didn't mean it had once been around or it had been there.
To me, it was never around nor was it here before - I just pretended it has always been around or it has always been present.
Alas, the day doesn't exist without the night while black cannot be seen without the appearance of white.
Then how can I say something is definitely missing without it's attendance in the first place?
Beneath the above cliche, I say I do not have It but I am only aware of my lack because It resides itself in many others.

I am missing what others have.

'Having it all along' was a pretence I have become used to - so used to an extent I began to believe it's genuineness.
Something is definitely missing because I came to realize it's absence, rather than it's disappearance.

End; Missing does not mean disappearing.