He says stuff to hurt me?

My boyfriend the other night told me the worst thing to ever happen to him and he said he was really sorry and I forgave him and explained how that’s worse than ANYTHING he ever said to me. Then we got in a argument tonight and he said it. He said word for word “you’re the worst thing to EVER happen to me” I got really upset again and just left his house. He knows it hurts me and he does it anyway then he says he has to work on his anger. He said a bunch of other mean stuff saying I’m no good etc... He blames it on his anger issues. BUT, how much can you say when mad that you don’t mean?! especially the same thing each time? His ex cheated on him and all so for him to say i’m the WORST thing, hits hard. Advice??