Am I in a dead end relationship? Advice please

I think my relationship with my daughter’s dad is nearing an end. I can’t go into specifics, but he wants me to do something that is completely against all of my beliefs. It would compromise my self worth, my beliefs, and the respect I have for myself. It really makes me feel like he doesn’t love or respect me and I just don’t know how to get passed this feeling. He told me that we can’t move forward with expanding our family or getting married or anything unless I do this. He wants me to make a sex tape with a random person so he can have it and he claims this will prove my honesty to him. It’s such a f’d up SAD situation and I just don’t know what to do.

I want to be with someone who loves, values, and protects me… Not someone who makes me feel this way. But my heart is BROKEN because I do love this man very much. I’m grieving the life I wanted us to have.

I don’t know what to do. Should I just walk away or should we work on this?