Why is he not responding to me?

My friend and I got into an argument about a week ago. He said he was sorry for everything before we both parted ways. I didn't reach out to him and he also never reached out to me. I started to get the urge to text him yesterday so I messaged him saying that I would like to sit down and talk with him but he didn't answer. I sent one last message again today telling him that I'd give him space but that I'm hurt by him not responding to me. The whole argument happened because he was being insensitive and in a way playing mind games. He usually always answers me even if he was trying to tell me he needed space. The one other time sometime similar happened, he blocked me but I've noticed that the messages I've sent now are going through so he didn't block me, he just isn't responding. Before anyone says anything about me texting him again today, I will not be saying anything else to him until he says something to me.

Why is he not responding to me?
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