I used to be bullied at work. It happened to varying degrees, on-and-off, for several years.
The gist of it was that there was a group of people at work who needed to feel like they were the "in-crowd." They did this by making big shows of how great friends they all were with each other.
I was weak. Both in terms of my position in the company and my personality. They excluded me. They saw how hurt I was, and they didn't care at all.
Even though I am not bullied now, even though I forgive them, I will always remember how it felt.
No one hears me
I only waste my own energy
Seeing myself cry just makes me want to cry even harder
I take a knife to myself
Finally they cheer