There is one sure way to leave. Leave. Tell him you will not live with his rules and distrust anymore and go. You have done nothing wrong. He is being unreasonable and using your past as an excuse to control you. If you had a perfect past he would find something else to focus on to keep you under his control. He will not flick a magic switch and change on your wedding day. It doesn't work like that.

If you don't have anywhere to go, call a women's shelter. They will help you. You do not have to manage your exit alone.