Why do I feel guilty blocking my ex?

Anonymous
So my boyfriend of almost 4 months decided yesterday he didn't want to continue our relationship. He said we're just not right for each other, even though when we were together we clicked and had fun, until an issue came up that could easily be worked out by simple communication. He was the type that never felt he did anything wrong to cause me to be upset, that I was being ridiculous. Basically taking the easy way out by turning the tables and stonewalling me. I came to realize that I was dating an emotionally unavailable and somewhat immature 46 year old. So HE chose to break it off with me, the one who always believes relationships are a two way street and takes dedication between two people.
I deleted and blocked him from messages on FB, and I also blocked him from my phone. I cannot be tempted to reach out to him to try to convince him what he gave up on. He has always called it "blah blah blah". I know it's his choice and his loss. So why do I feel guilty? I know that cutting all ties is the best way, but deep down I feel like I need to leave some way for him to contact me. For some reason I feel he will. I always felt we had potential to be awesome together, especially only 4 months in, still getting to know each other. He has so many good qualities, he just didn't want to make the effort to work at it. Do guys ever think about this when they've been away from that person for a while and realize it was all worth it?

Updates
+1 y
***Update to my post from 3 months ago***
Well we are almost 2 months in and we have been going strong. A month after I posted this, we slowly started to chip away at what was keeping him from opening up and getting closer. It took a lot of patience and understanding, and we are so much closer and more relaxed than ever before. Thank you all for your feedback <3
Why do I feel guilty blocking my ex?
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