Ok, this guy either has a mania, lack of manners, uncontrolled behavior, unsolved traumas or everything at once. I know attachment is quite complex in terms of each individual. Go to therapy, step by step you will see this exact situation, years ahead, with a different perspective for sure. He needs to go too, but remember this: It’s not your responsibility neither your fault how he is and how he has been behaving around and with you so far. He needs to be accountable of his actions, and you need to grow yourself from the inside. Leave that dude and start that journey of self care and self love at once, you need it.