The Vampire Diaries: 10 Worst Things Bonnie Has Ever Done
9. Avoided Caroline After She Turned
By the time Caroline turned into a vampire and accidentally ate the cute guy Bonnie talked to at the carnival, it was all too much for the Bennett witch. She didn't hate Caroline, but she had a hard time reconciling her feelings toward vampires now that her closest friend was one.
While she used her powers to help Damon and Stefan track Mason and the moonstone, she avoided Caroline, leaving her friend to feel abandoned and snubbed. This especially hurt as it coincided with Sheriff Forbes learning Caroline's secret.