Duplicity: deceitfulness in speech or conduct, as by speaking or acting in two different ways to different people concerning the same matter.
Dear acquaintance,
Duplicity perfectly describes who you really are. The saddest thing is I thought you were my best friend. I am glad to know that in the end, it's you who's losing. So keep on lying and speaking lifeless words. I'll just keep on living.
Sincerely,
ME
