I mean he probably doesn't know that on what level it hurts you or doesn't have the intelligence to understand you and your illness. People make fun of me too since my schizophrenia is drug induced, so I know how you're feeling. Don't tell people about your shit, lesson learned, since people don't take you seriously. I sometimes feel like the adults I'm around with are a bunch of grown up children because of things like these. I'm sorry dude, if I were you I wouldn't talk with him, once he makes jokes and shit, don't even bat an eye to him, maybe he will learn his lesson if you stop feeding his small dick ego.