First, let me state:
I have never liked the term “bullying” when it comes to a student’s peers. It diminishes the effect of their abuse and harassment. There are definitely an infinite amount of “grades” (as in severities) when it comes to “bullying,” but many of these “grades” are enough to damage a person. I understand we are all responsible for our own actions, but even in CBT the general consensus is that you can control your thoughts and invariably take charge with your feelings, but feelings themselves are natural and often do what they want.