Most Helpful Guy
Don't listen to those "what do you care, he's an ex" idiots. So because you break up, you cast aside the feelings you once had immediately as if they don't exist. Idiots.
But he's either doing it for effect or he's trying to move on.
What I mean by for effect, is because you'll want to reach out to him to know why he deleted you. Just as you're confused and asking us here. He might be hoping you'll reach out to him. Or again he's trying to forget you because the pain of seeing you out on Halloween having fun was hard for him.
I do hope you get closure though:). It's though to be deleted. My ex did that to me. Hurt like hell.