Abusive???

I was with my boyfriend last night, we’ve been together for a while now. Everything’s not perfect but it’s okay- a regular relationship I guess. He’s sweet, caring, he listens and everything else, never been abusive physically or mentally. We were in bed just talking and I forgot how this conversation started, but he goes “if you knew what I knew, you’d stay quiet”??? I stayed quiet for a couple seconds trying to process what he said, then I asked him if he just threatened me because wtf? I haven’t done anything. He proceeds “i can take those braces out of your mouth and it’s gonna hurt”. Me being completely confused and turned off, I tell him to do it since we’re being bold all of a sudden. Wtf is going on in your head? So I kicked him out of my house and told him to never talk to me or literally any woman like that and it’s very off putting, it’s seems abusive, and I can’t deal with that. I broke up with him, but he completely ignored it, texting me while I slept as if everything is normal.

We always say we’ll be together forever jokingly. I broke up with him once, he did the same thing. I thought about blocking him, but he knows where I live. Don’t know how to move forward because I am actually scared & see the clear red flags and signs of abuse.