Hello, Me of my four friends were joking around at break. One had posted some photos of bulls, with their balls very obvious. So basically I said to him that he must like cow balls as a joke, which he immediately strongly denied. So natually, I went "its ok if you like cow balls, nobody will judge you" and that and It went on for about 2 minutes. Then, he turned and said I have no friends I should kill myself, and one of my other friends there backed him a bit, and said that the reason I was joking about it was because I have no friends and I am a dick or whatever. The other one stayed out.
As you would expect, this kinda pissed me off. So the conversation kinda changed after about 5 minutes more of this, and then it changed. Then, something came up and I mentioned cow balls again and he stormed out. My friends that were still there were still calling me a dick, and maybe I was. However, when I said that they do **** like this to me all the time, they simply responded "you can take it", like it was some kind of argument.
Now my friend is quite clearly mentally unstable. I had to talking him out of cutting himself at a party, and he constantly posts weird **** to our group chat like frozen hentai. Quite frankly it is irritating that he gets special treatment while I am insulted most of the time and I just laugh it off like anybody else would deal with banter, but oh no, I touch his precious little feelings and everybody closes ranks around him. It maybe to do with a girl that likes me who is in a strong position in the group although, but I am not sure.
Thoughts? I have no doubt I did some things wrong, but I am still confused how this response is considered ok.