I wouldn't think he's sitting so easily right now. This wasn't his intention. His intention was to get more attention from you, whether he gets it by saying and doing hurtful things for reassurance or by playing the perfect man to feel good about himself.
I've dated a man like this. I wouldn't have been able to write a long message like this without him potentially kicking off because I was 'ignoring' him.
Every single time something happened he didn't like, he walked out. After, I'm ashamed to say how many iterations of this, I finally said to myself ok the relationship is over. He's dumped himself by mistake, but I'm going along with it. I accept the dumping.
He was furious. At first, he offered to forgive me if I'd apologise, since the argument I mostly spent locked in the bathroom for my own safety, was obviously my fault. It was also my fault that I made him pack his own things and drive away, even though in the very early days I'd even been to the effort of yanking his keys out of the ignition and threatening to throw them somewhere he wouldn't be able to find them until morning to stop him.
The thing is, he enjoyed my begging and flattering him. He loved the thrill of being chased. He enjoyed my eventual weary capitulation to his position, because winning over me made him feel good.
He won't be feeling good now that adoration isn't on tap. And he believes he's entitled to turn on that tap whenever he wants because he values his needs, not yours.
Whether he says so or not, with every hour or day that goes by, he'll be bricking it more and more that he's lost his golden goose by going too far.
And it's in his interests not to contact him either. He has to learn that there are consequences to treating women like this. Don't try and explain yourself to him - he'll twist it in his mind so it won't go in and don't pay attention to any messages that are clearly meant to make you feel sorry for him.
If you do intend to get back with him in the future (which I strongly advise you don't), you need to send a strong message through your actions that you won't tolerate this behaviour.
Hope you get well soon too. Tonsillitis sucks :( 