Hi Hanging,
I'm so sorry that you are struggling. Facing the truth of our experiences can hurt so much. And it makes so much sense to me that you don't want to have sex—how could you if you don't feel safe? And then having to deal with feeling even more unsafe is so difficult.
Step by step. You have realized that you want out. That is HUGE. Be gentle and patient with yourself. It will be hard going and of course you want to get out yesterday, but step by step you will get through this and feel free.
Maybe God has brought these decisions into your mind in the first place? And shown you that there are resources out there that will help you... .like here.

Keep posting and let us know how we can support you.
Regarding the boundaries around sex: have you tried validating his desire in a gentle way and then kindly and firmly stating your truth/boundary? How does he usually react to this kind of conversation?
heartandwhole