Why do exes get back in touch?

He cheated on me. I left and didn't want to hear from him anymore.
Since the break up, he would call me and text me daily. Also starting to date the girl he cheated with. I received many calls and he won't shut up about the fact he is not happy, he doesn't love her, she is not me.. blabla. Man, no one point a gun on him, it was his choice to be with her.
This hurts me more than I can say in words. Is he trying to hurt me?
Why do exes get back in touch?
Why do exes get back in touch?
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