Struggling with breaking up

Hi everyone , I am in a relationship with my finance but my doubts are piling up and I want to break up but I am worried I’m making a Mistake and I don’t know how to break up with someone. Some back story we have been together 3-4 years and our journey back to Christ really brought us together. However recently, I’ve been having major doubts for a new reasons. One the comments they make related to politics and race (sometimes about my race even if not direct towards me), also well we had a established a more traditional roles in the relationship , the controlling is starting to be overwhelming where I always have to say where I am and what I’m doing , as well as if I want to maybe stay out late I can’t and need to ask for permissions for lots of stuff I.e) spending money etc. what brought us together was our journey back to Christ but I am feeling like this is not of Christ anymore based on their actions as they have very ungodly feelings about things. I feel guilty all the time because whenever we have any problems it’s put on me , I feel like I’m constantly walking on egg shells and I feel like I’ve lost myself in this relationships. However my big issues is that I’m scared to break up for multiple reasons , first what is I never find another Christian man? What if he is meant for me ? Also we are engaged I am so confused any advice is welcome.