My ex

Okay so I’m 24F and my ex is 31M. He reached out to me wanting to get together. That was about three weeks ago. He said he was busy at the moment and I am too but why reach out to make plans then not respond that long. It’s so annoying and I’m not too sure what to say as I deserve to not be ignored for three weeks regardless if you’re busy. It takes two seconds to say, “sorry still really busy, can’t meet up now” if that’s even the case but idk

I think I might just block him