If someone wants to lie to you, deceive you, or mislead you, they can do so for a long time – depending on how good they are at such things. You may now be feeling foolish or guilty because someone you have known for a long time and thought you knew well has revealed a secret, or has exposed a lie of some kind. But that’s not on you, Gemini. You trusted because you had no obvious reason not to trust, and that’s your higher calling. Just because you weren’t looking for deception doesn’t mean you should blame yourself.