AITA for not wanting to be friends with someone with countless mental disorders?

Anyways I’ve been friends with someone with 6 mental illnesses for 8 months, but I’ve decided that after our 4th argument that I no longer wish to be friends with him, as he always blames me for his problems. For example in English class he had an anxiety attack during a presentation (I’m not even in that class), and he texted me about it and began blaming me! After not talking to each other for a week I told him that we shouldn’t be friends, then he begged me to still be friends, but I refused to. He began cussing at me, then I just continued on as if nothing happened.