I think this song is about a relationship that never got the chance to succeed ("star-crossed, you and me"); a relationship in which both of the participants have moved-on with their lives but both have always truly wished they were able to be together... their love and desire for each other is always in the background and it can't blossom and flourish because of their circumstances, so they will be "forever blue"... "wait for me" might mean that both secretly they wish for some change, perhaps the afterlife, that will allow them to be together.
I think this song is about a relationship that never got the chance to succeed ("star-crossed, you and me"); a relationship in which both of the participants have moved-on with their lives but both have always truly wished they were able to be together... their love and desire for each other is always in the background and it can't blossom and flourish because of their circumstances, so they will be "forever blue"... "wait for me" might mean that both secretly they wish for some change, perhaps the afterlife, that will allow them to be together.