To me, sounds exactly like the group M2M.....but I have checked every song they do and haven't found this song!
The lead singer is female and sings in a very "breathy" way.
The line from the chorus is "Every day.......Every night......I....."
Now.... the word "I" above is sung for a long time....several bars......really prolonged. The song is slowish and melancholy.
Any help is greatly appreciated as I have been looking for this song for over 10 years.
PS: There is nothing on Google, so if you search Google and write back about results found there, that's not it. I have searched and searched and searched.
I am hoping someone personally remembers this song and can help.....