What do you feel the most shame for having done ?

Not seeing who the true friends were and letting some of the use me. One of them knocked at my door and told me his sob story. He borrowed $2500 ( most of what I saved that time) and he was never seen again. It was the time when I needed that really bad as I was a broke young student. It made me question life and the model that I had built around that friend. I recovered from it though. Thinking that’s the price I paid to keep someone like that away from my life.