I always thought it was about a lesbian relationship she might have had, relative to the line about leaving her girlfriend - it being a type of relationship that's "still forbidden, and few around us knew". It also sounds like she had a heterosexual relationship before knowing truly that she was more inclined to be with a woman. It's funny how everyone has their own interpretation of the same song - such is life.
I always thought it was about a lesbian relationship she might have had, relative to the line about leaving her girlfriend - it being a type of relationship that's "still forbidden, and few around us knew". It also sounds like she had a heterosexual relationship before knowing truly that she was more inclined to be with a woman. It's funny how everyone has their own interpretation of the same song - such is life.