Do you consider this rape or sexual assault ?

So I escaped a domestic violence relationship. I was mentally, physically, emotionally, sexually abused. My ex started getting very controlling and I wanted out. He told me he would kill me if I tried to leave he started forcing sexual on me and I told him via text how it made me feel and he said he would never force sex on me again and apologizing. I told the police and they said it’s not sexual assault or rape and let’s remind you he admitted to doing this to me. Evidence in black and white. What do you all think my next steps should be and by reading this what you think rape or sexual assault. The second one is a message of his own cousin that know what he had did to me. Detectives saw all messages and he walks free.