Friends to be,Friends to Become

He's my brother
She's my sister
She met me for the first time
She will always stay my friend

*They are*

He's my best friend
She's my best friend
She's going out with me
She became a new friend

*They helped*

He listened
She gave advice
She talked
She went on vacation

*What will happen*

I don't know
I don't know
I don't know
I don't know

*We'll see*