I know that I was VERY fortunate to not be treated like that at work (I dont work anymore). But one of my best friends who was also my co-worker for a while, was treated so badly by our colleagues that it was bordering to harassment/bullying. I read about this, and one of the pieces of knowledge I gained, was that a work-environment can be dysfunctional. I never thought to look at it like that. A really bad culture can develop, for several reasons, and that can make co-workers take part in the bullying. People are more suseptible to that than we choose to believe. See a therapist, read some books about it, might help you. But of course, it doesnt completely solve the problem. You still have to face the situation every day...