Ending FWB TW: abuse

So I was fwb with my ex for 2 months now, but only actually had sex with him twice. Deep down I knew It wasn’t healthy and didn’t see an end to it only because I felt like I was too naive to let go. I got my stuff back from him, and decided to tell him I’m over it and don’t think it was a good idea in the first place. Keep in mind he told me if I was ever uncomfortable with it that I can stop anytime and he would understand and not be angry. Well it was the complete opposite, I told him calmly that I didn’t think it was healthy for both of us and that I didn’t want to show care in a sexual way and that being just friends would be much better. He started going off on me on how I’m ruining everything and that I can’t just change my mind like that. When he said I’m making It worse I asked him specifically “for me or for you?” And he just replied “whatever do what you want”. He called me a liar multiple times saying that he did care about me and even went as far as to say “when you were sick I called so that shows I cared”, why would he throw that in my face? I left him a couple messages explaining that I can’t talk to him about anything without him being aggressive towards me and that I’m genuinely terrified when he gets upset. (He was pretty abusive in our relationship), so I finally ended up blocking him EVERYWHERE. I thought I’d feel relief but honestly I feel so fucking guilty and I’m starting to regret blocking him or even telling him that I was uncomfortable. Im not sure why I feel this way when I know I did the right thing. Has anyone been through something similar?