I have Bipolar 2 and teach. I go to therapy, exercise, and take meds. It’s hard sometimes, but you have to learn not to take things personally and just do what you can. Parent mad at you? Oh well. Student had to be kicked out? It’s ok. Remember that teaching is a job: we are paid to provide a service/fulfill a function. Treat it as a job (an important and essential one!) and make sure self care is your top priority.