Who am I ???

Who am I?
Well I don't really know how to answer this question...
Sometimes I know who am I but most of the time... No...
One thing I'm very sure is that I am a human
A very tiny living creature in this universe
Weak and will die easily, very low survivability

Scientist predicted there might have some living creature out there in the galaxy
There are a lot planet out there just like earth...

I was thinking what if I was born in the other planet?
Maybe other planet from other solar system
How do I look? Do I still look like a human?
Or maybe it just an ugly alien that we human hypothetical
Maybe I will be super high intelligent than modern human
Or very very stupid without any brain...
I'm just thinking there might be someone like me in the outer space
Behave like me, having same thought with me...
If it does exist, it might be very interesting

Every time before I sleep
I was thinking about life, What is the reason why I'm here on this planet
God created us, there must be a reason
I know I have responsibility for this
What will I be in the future? Useful or useless?
There will be a place for us, to fulfill those empty spot...