Well no. because unblocking someone takes actual active thinking. The thing is it's not like something that you can passively do which is something that would be implied by the "oh I don't need to worry about her anymore" and go and unblock someone. Having a block list in no way is something intrusive nor does it require one to look at after you're finished making the list unless you actively go there to see who you've blocked. I have a good long list of blocked people on Skype. Many that I don't need to worry about anymore but I would not even think about them at all or worry about the list unless I needed to go through and look at it. Takes more energy to go out of my way to get to my blocked list and remove someone than to just leave it and typically if I don't need to worry about someone any more and I'm not thinking about them they tend to remain on the blocked list until I think of them and realize they are blocked. Same with facebook, same with pretty much every social networking program I've used. and yes I think this detailed about behaviors all the time. sue me.

tldr; He had ot go out of his way to unblock you and that, alone took thought and energy.

(more on the rest of your post after I read it but this just stood out for me)