Since I like this song, this is how I interpret it.
Stevie initially said that this was an angry song about Lindsey. In the beginning of the song, basically she's saying life goes on (after a break-up), but she's afraid that he'll be mad forever, that they'll never get to be friends, that if they don't talk about it or get past it (the break-up), they'll never even be friendly towards each other. She wants to be friends. She tries to explain the reasons for the break-up; she was changing; he was changing. She didn't want to be controlled. Then towards the end of the song, it sound like she regrets breaking up, dreaming what she dreams, but still she's glad he left anyway. Then at the end of the song, she gets mad. She's just going to live alone; he's just going to never love again like he loved her.
Lee
