Because

I can't stand it whenever you're apart
Sometimes I'm worried
Hey are you thinking about me too?
Have your feeling never changed?

Those questions kept popping on my mind
It's not that i'm not trusting you
It's just that I'm worried that someday
I might be nothing to you.

Tell me that I'm not alone
That i'm not walking down through this abyss
All by myself like a lone wolf that's separated from its pack.
Tell me that you'll be here to walk by my side.

Just the thought of you getting close with another guy
It kills me
I'm worried that there's somebody there that's going to,
Stole my position in your heart.

Over thinking kills me,
Do you talk to them the way that you talked to me?
Do you smile to them like the way that you smiled to me?
I really hope that's not the case.

Whatever it is,
Just know that i'm always be there for you
Although not physically,
I'll always be there
Whatever happens,
I'll still be there.

Because I'm your best friend.
You're special friend,
And you're special to me ;)