You are my best friend

I have amazing friends,
But then there is you.
Crashing into my life,
Like drunk Scooby-Doo.

One in six billions, One of a kind,
A combo between cheerful nature and a sexual mind.
Long shiny black hair,
Backs up your stunning smiles and horrifying glares.

You plus me is equal to selfies,
sarcasm and silly jokes.
Our late night chats are as funny,
as our face-to-face talks.

We may have promised to stick together till the end,
But someday you will leave me and go.
You are bound to, as it is the way of life.
But then, it will be just me, me, me and my sorrow...