For me, personally, I relate it to wanting, not losing. It could be about either one, but the lyrics to me seem to describe something that the narrator never had in the first place, except in her dreams. That's not a very nice place to be, constantly longing for something I mean. And I think they capture this well...Whether she had who she's missing in the first place or not, I definitely interpret this as longing for someone.
For me, personally, I relate it to wanting, not losing. It could be about either one, but the lyrics to me seem to describe something that the narrator never had in the first place, except in her dreams. That's not a very nice place to be, constantly longing for something I mean. And I think they capture this well...Whether she had who she's missing in the first place or not, I definitely interpret this as longing for someone.