What are you

What are you?
Not my friend!
Remember what you said,
We'll make it to the end!

You lied!
That's not the person I know.
So just don't get near me,
Get away from me, just go!

You became popular.
You became something you said you'd never be.
You just forgot about everything!
You forgot about me.

What are you?
I ask again.
Your not you,
when this friendship began.