Most Helpful Girl
He clearly is over you. Or at least trying to get over you. He's not going to fight for you when you've already broken up. He might have done so before because you were still together, but that is not the case now. You acting jealous probably pushed him over the edge and made him realise there was no point in staying in touch with you if you're going to act like his girlfriend while being broken up.
You still have an attachment to him, but it's wise to let go of that. Be sad, be angry, whatever you need. And then you'll feel better and before you know it you're over him. Good luck.