Why is my boyfriend ready to dump me for doing something he did to me?

My boyfriend used to ignore me for days and weeks. I did it back to him and now he wants to break up for good. He says he is over the relationship. Although he ignored me for so long I stayed available and didn't do it back. I do it back to him this one time and he has just been a jerk. He can't get over it. He wants to break up with me and says he's going to be/find with someone else, it won't be hard he says. I thought he was joking but he is so serious.
Why is my boyfriend ready to dump me for doing something he did to me?
Post Opinion