Can anyone help identify this song?

A friend who’s looking for movie theme music asked me whether I could identify a song both of us remember from way back when.  Unfortunately, neither of us know its title or the singer.  Some of the lyrics go something like this:

1999
Will I be yours?
Will I be the one that you love?

The second line alternated between “Will you be mine?” and “Will I be yours?”, and perhaps something else too.  The chorus went something like “It will be a strange world without you, love”, repeated several times.

I think it was a hit in South Africa in the 1970’s or early 1980’s, but I can’t be sure whether it was popular anywhere else.  It had a fairly hard-driving rock rhythm, electric guitars and drums, with a relatively slow beat.

Do you remember that song?  Can you identify it?  If so, please let us know in Comments.

Thanks!

Peter