I know you want answers and you want the pain to go away. It doesn't sound like either is going to happen as quickly as you want it. Talking to him and having him treat you like that just really opened the wound again and that's why you are feeling horrible right now. In a way, him treating you like that is helping you detach from him because he isn't the person you fell in love with now. But he's not going to magically change and swoop in and whisk you off your feet and say "I'm sorry, I love you". He thinks he is right, he is stubborn, and it's not realistically going to happen.
He needs to be on his own to really sort things out. Ironically, this doesn't usually happen unless he can't have you. As long as you continue to call him and contact him, even if it is about your stuff or something important to you, it's just going to further validate his decision. If you need your stuff, get it back and go into all out no contact mode so we can get you away from square one here and get you back on track to being the normal happy girl that he loved about you in the first place. It hasn't been too long a period of time, and it's going to be hard. Devote each and every day to doing things for yourself while taking care of the things that need to be done (school, work, etc.).