You blocked his emails, but he has still found a way to reach you?
Yes, anything is possible. It's possible he feels guilty. It's also possible that he wants to keep you available in case he doesn't find anybody else.
You will have to decide if you are willing to risk being right back in the same situation if you should happen to get back together with him, but things do not work out again.
I suggest you ask yourself if anything has changed. By that I mean is there a significant difference (in behavior and/or attitudes) that would make a relationship with him better now than what you previously had?
If so, and you both agree you want to try, then more power to you.
If not, then why keep hoping for something that isn't going to happen?
