Most Helpful Guy
Move on, he is an asshole. He is not a friend, nor a person you want to have in your life, if simply does not care about what you are going through.
You will see who are the good people in life, when you are going through bad times, that's the true test on your friendship or any relationship.
Ignore him completey and do not ever reply to him again, if need block all contact of him.
You didn't do a dumb thing, you did the right thing by break up with him. He is a toxic person, and someone that will only bring you down.
Most Helpful Girl
Stop replying to him if you don’t want anything to do with him. He will get the hint soon enough