Please,don't let this cause a breakup.If I were a man I wouldn't
be attracted to a gal with a mustach either.You just must mention it to her with love.Suggest she get a depilatory cream to remove it.If she doesn't love you enough to understand than you have your answer don't you!She may not know it's that obvious.Good luck.I just found this forum today.Hope you come back since you posted so long ago.