I don't know you at all, BUT.. you let them make you leave, you have also let them win. If you let them see your buttons, they are going to push them. If you tell them they are hurting your feelings, they will hurt them more. They want attention and to feel like they got big balls..... if you don't give them the tools, they can't sell their products, so don't give them the tools to sell it for you. Keep them to yourself and they will find someone else to pick on, it is as simple as that.
NEVER EVER let a bully know they are bothering you or hurting you, they carry salt in their pockets and just love throwing it on your open wounds. Ignore them and they will go away.
There are a LOT of bullies here, but at the same time, there is a large amount of really good people, ones you can make good friends with as well as do great business with. Deal with them, ignore the rest. 
