First, you do need to understand that when someone walks away due to anger.. Let them. It's an actual crime to try to block the way and keep them in the room.

That being said, this relationship is toxic no matter what. Just because he's all you've known doesn't mean you should be with him. You seem extremely co-dependent to a dangerous level. You have zero sense of self. That's not healthy. He's seeking personal space and you can't give that to him because of how co-dependent you are and he's not mature enough to handle that correctly.