His obsession.

My boyfriend is obsessed with my past. He calls me a slut because I fucked 7 guys and I’m 17. He tells me these all disgusting things because I deserve it. He says he is breaking his morals for me because he hates people who hook up and I did it with a lot of people and had sex too. I don’t know what to do, he constantly asks questions about every little detail about every single guy. Then he says I’m heartless and I can’t change and I said I want too. He is very judgmental and he said he will never forgive me. I don’t know what to do with this. How do I earn my respect back?