Trying to recall title for movie/tv series, where there were two worlds right above each other.  I only saw a trailer never saw the thing.?

The parts I could remember about the trailer was something along the lines of, there was a guy and a girl on the opposites of those worlds that wanted to be together.

If I recall correctly (which i might not be remembering)---im assuming it was a romantic sci-fi sort of romeo/juliet thing, im not sure if they were hindered from being together because they physically could not stay away from their own planet for too long and get pulled back,  or that  the societies from each planet hate each other, or both, or neither.   but that was the vibe I felt when i saw the trailer, many many years ago.

I hope some movie experts there could recall a shortlist of possible titles for what this movie title was  or if it was a tv show.

I do know that  its not "another earth" indie film.Thanks in advance.