Most Helpful Guy
In ANY relationship (including friendship all the way to marriage), the person with the least emotional ties to the relationship has the easiest time leaving. Typically that means guys. Not always, but in many situations that's how it works. Does he feel shame in what he did? In all honestly, probably not. For whatever reason, he chose a hateful way to break up.
You may never find out WHY he broke up with you. There are still questions I have as to why my ex divorced me, and that was 22+ years ago. I've since remarried and am very happy in my current marriage. But those Q's remain. After all those years I rarely think about them, but they're still there.
Best thing is to try to go back to a routine for yourself. Do things that you enjoy doing, and try to look at the little things (for now anyway), that bring a smile to your face. You'll feel better in time.
Most Helpful Girl
It's hard to say without anymore info about your relationship with him , but sometimes you learn more about a persons character at the end of a relationship than you do during the entire time you were with them