Just a bit of insight, I've been searching everywhere for an explanation from Ellie herself and could find nothing but "she drew inspiration from her childhood"...
Then I found this quote that might help:
Her childhood was an important period and she puts some details in the video about a friendship that made her compose these lyrics.
"It's a song of realization, because at the end I say, 'I'm the girl that can give you everything you need, but actually I don't need you necessarily,'" she explained. "It's just about someone finding freedom in some capacity."
Just a bit of insight, I've been searching everywhere for an explanation from Ellie herself and could find nothing but "she drew inspiration from her childhood"... Then I found this quote that might help:
Her childhood was an important period and she puts some details in the video about a friendship that made her compose these lyrics. "It's a song of realization, because at the end I say, 'I'm the girl that can give you everything you need, but actually I don't need you necessarily,'" she explained. "It's just about someone finding freedom in some capacity."
http://www.sweetslyrics.com/news-3946-Ellie%20Goulding%20talks%20about%20her%20new%20video%20"Anything%20Could%20Happen".html