Why does my narcissist ex keeping blocking me, unblocking and blocking me again on social media sites and WhatsApp after a year has passed?

To get your attention. It’s apparently working.

Why are you always looking to see if he has unblocked you? It appears that you are the one seeking attention from your ex

I think the fourth word in your question actually gives you the answer.

Why do you keep going to his profile? How else would you know you're blocked 🙄

Sweetheart - on a serious note - PLEASE........... google 'stone walling narcissists'........
I implore you........they WILL hurt you,and hurt you and hurt you some more......
THEN...........and only then will they start to make you suffer😢

All my love and strength ❤

Maybe he’s not a narcissist and he cares about you but wants to move on and is struggling to let go

Who knows?
Best you block him on all those sites and take the decision away from him.

You should actually ask yourself why it bothers you

Part of his game plan. If you blocked him that is when it will end

He wants to remind you that it’s still all about him

Ignore them, and pretend you didn't notice

Stalker, block and keep him blocked.

Idk.

Just block them, they will get the message