I too am brand new to this billboard and when I was looking through other threads I saw your "final goodbye" and concern about your involvement with the billboard. I know I am just jumping in...but I did want to share a thought.

I was sad to see you felt it was unethical even though you also were seeing what a help it was for you and your relationship. Although my view is different, don't stop talking about your problems...don't ignore them. If you feel you are being secretive with your fiance while you are trying to sort through your issues, then go to a counselor together. Don't stop pursueing resolution to your problem!

Good luck!