My ex-boyfriend has been pestering me since we broke up. What should I do?

I think you can completely ignore such a person. If you think you still like him, forgive him. After all, it is not easy for two people to be together. Now that you want to break up with him, he is still looking for you, which shows that he likes you very much. If you can, don't break up and tell him what's the problem between you two. If it's his fault, let him change it.

But if you insist that you have no feelings, explain it to him first, and then say that you already have someone you like. Now I hope you two become good friends. I don't want him and another person to disturb your life.