It’s exhausting being friends with people with mental illnesses

This is going to sound bad but I have friends who have severe mental illnesses and it’s kind of exhausting hearing them constantly talk about their mental illness because they won’t stop bringing it up. The part that makes me mad is that they always have an excuse for mental illness like their mental illness is what makes them a shitty person. I do care about them but to be honest it’s kind of exhausting hearing people constantly talk about their mental illnesses. I do have mental illnesses myself but I don’t constantly talk about it like they do.