Why did my recent ex boyfriend suddenly blocked me on Facebook?

He also never touched his IG but now he changed his display pic… what’s even happening… we’ve only been separated for a few months cuz he broked up with me… so this hurts a lot. I did reached out couple weeks ago because of my mails potentially going to his place and shared credit card. Im so confuse…
Why did my recent ex boyfriend suddenly blocked me on Facebook?
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