A couple things to consider, from the outside, it is problematic to say that "you need him to be your dom again." Like the other person, you need to flesh out if this is a dealbreaker for you. Once trust is broken, it takes a lot to rebuild it. Since you feel like you need him to be your dom, you will be more likely to overlook this but it is a real and present hurt. No one deserves to be in an unhealthy relationship or to have their mental health pushed aside. Being in a d/s relationship or even any relationship is a two way street that requires each party to care for the other person in their own ways. Good luck to you and if you need anything else, do not hesitate to ask!