They ask 'What can't I live without'

I answer a who

Someone that was with me through birth

Someone that knows who I am

They guess my mom

But one day I will have a family of my own

Its tricky to try and guess

You barely know me

We have those day's that we argue

But that only lasts for a while

Its someone in my family yes

Someone I count as a friend 

Someone that always has my back

And I have hers too of course

Together we can be counted as one 

For if we are separated 

There would be no good to come

So they ask me now 'Who can't I live without'

And I reply 'My Twin'