Noria, work is a challenge. Outside you can choose your friends. Inside work you either learn to insulate yourself from it or not react to it or choose a new job.

People that bully you are not friends and maybe never were. I often find myself picking the ones that are least sensitive. Focusing on work and being a social recluse are coping methods. If bullying continues see if the boss is on your side and maybe can move you to a new seat that is less vulnerable to bullying.
Thank you for sharing your story.