Hi and welcome!
There are many people here living in situations such as yours, and YEARS of experience.
There are skills you can learn to help you communicate better with him, and "detach with love" to stay healthy yourself. This page contains many lessons:
https://bpdfamily.com/message_board/index.php?board=36.0It can be a bit overwhelming, but start reading! I'd suggest Validation and Boundaries to start with.
Also, post specific situations and conversations ahd we can help you to develop strategies.