She's feeling dark. Like something... wrong. Similar to Everybody's Fool in one respect, she was wearing a mask, and refusing to see who she thinks she is. Through this, she's driven away the people who care about her. She's finally waking up and seeing it, but it's too late, and no one is there for her anymore.

~
The first verse is her taking off the mask, but she still believes she's something malevolent. Somehow not right. Her self-esteem plummets, and she falls into a cycle of self-destructive behavior.

The chorus is her seeing everyone distancing themselves from her.

The second verse is her not understanding what's happening to her, she doesn't like who she is and she wants to know why.

Then we have the chorus again.

Her getting scared, not knowing what will happen to her, what she'll do to herself when everyone is gone, and there's no one to keep her alive any more.

With the last repetitions of the chorus, we have her falling further into self-destructiveness and self-loathing, and she obsesses over what once was, convinced it's all over, there's nothing left, an no one hears her silently screaming for help.
~

Similar to Katya's first concept, I know... especially at the beginning.