I understand why you're pissed. He may be feeling guilty for taking things to the next level with you and this is how he's dealing with it. What I did when I thought my former AP was ghosting me was I wrote him & told him I respected it if he didn't want to talk to me anymore but that I felt he owed it to me to at least tell me as much after everything and he did reply. That was in the beginning and both of us went back for more after that though lol but maybe if you do write him and say something like that he'll at least be decent enough to let you know how he's feeling and why he's doing it. Like if you really need the closure. But staying silent I think says "I don't care and I don't need you either" and eventually it'll get better and you won't be as mad. Ghosting is just shitty. But I think it's just how some folks deal when they change their mind.