Always be my sister

Oh my sweet little sister
This relationship will never become bitter
I will never let tears fall down your bulgy cheeks
I will always save you from every problem like a whole pile of bricks
And making you smile and laugh is the only trick I know
We'll be there for each other at our peak and  low
I never want to lose you in my life
Because you are the only one with whom I can be both naughty and wise
Nobody can say that we two are siblings
Due to distinguishing features
But only we two know how similar we are
Loving and caring for each other no matter how far
Handling both of us becomes trouble for our parents
Our taste buds, choices, skill set are different
But very rare do we disagree on a matter
You are getting bigger and me getting flatter
Your choices for me has always been great
We two are really simple and straight
This has always been the plus point for both of us
And we never break each other's trust
We always fight for small things
And I always win for being elder
But whenever you cry
It's my heart that gets tender
You can only handle my anger and stress
And help me out of my distress
I'll never break your heart
And I'll always support you
This brother will always have your back

And This is my promise to you.