It might sound like a sweet love song, but I realised otherwise.
It tells the story of a narcissistic lover (the guy) and the girl. That's why she believes she has done something wrong and is constantly saying,
"Alright I can say what you want me to
Alright I can do all the things you do
Alright I'll make it all up for you.
I'm still in love with you"
When she finally gets the guts to leave (for paradise), she leaves a note on his door. He doesn't realise how narcissistic he's been, so he doesn't understand why she would do that feels heartbroken ("lying on the kitchen floor").
But then, she comes back. She comes back, and says the same thing again, with him asking for more. She's giving him everything. But that's not enough for him.