Why is he being like this?

So my ex and i broke up last year. He blocked me but unblocks me during big holidays to text me ’happy new year’,’merry Christmas’,’happy easter’ Why? After i reply he blocks me again. He doesn’t want to be with me again but today he didn’t block me again but instead kept talking about funny memories. He doesn’t wanna tell me why he texts me during holidays ‘ You ask too many questions’

Why is he being like this?
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