Why did my ex stop replying when I asked him those questions?

We were having a great conversation, he said he still has feelings for me and is always thinking about me, but then I asked him those couple questions and he never replied and left me on read.. it is so confusing, why did he do that? .. he had admitted that he has done a lot of bad things to me saying Yes, I know I left you a lot.. so I just "And are you that you did that -.- 😁?" .. in a kinda joking way.. he didn't see the message for a day, so I wrote "I meant, did you at least regret leaving me? but you are replying very late, it is ok if you didn't want to talk, sorry for all my questions, tc bye"... he didn't see those messages they were on delivered for 3 weeks, then he saw them and never replied. It left me very confused and wondering how did he go from saying I wish I can hug you and I wish we could meet again.. to suddenly not replying. Were my questions the reason? Please tell me

Why did my ex stop replying when I asked him those questions?
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