Why my narcissist ex boyfriend playing blocking and unblocking game after I broke up with him?

I broke up with my boyfriend because he was not serious about me and was constantly made me wonder about our relationship. He talks one day and disappears for a week. I guess he was giving me the silent treatment because I confronted him for something he did that upset me. I told him clearly that I don’t want to talk anymore. He got angry and blocked me. I didn’t block him because I thought he wouldn’t unblock me again. I don’t block people. I just delete contact and move on. He now every 2-3 days send me a miss you text. I replied once and made it clear to him again that I don’t want to continue any relationship. He said ok and blocked me. He again messaged me saying that I should know how much he misses me. I msgd him why should I know. He said for no particular reason and blocked me again. What is he trying to do? I blocked him for good this time. But still wondering if he really misses me or just playing a new game?
Why my narcissist ex boyfriend playing blocking and unblocking game after I broke up with him?
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