I was disappointed when I realized someone close to me was not who I thought they were.
Well, in a sense. But to be fair, I may have had my own "vision" of who they were and held them to that standard -- not really seeing them for who they were. I have to accept some responsibility for that, you know?
I've definitely worked through that! Happily, it hasn't affected my ability to trust -- just inspired me to be more truthful with myself and others ;-)