Why is my ex so hot and cold with his feelings?

Before you ask why I still talk to my ex, we are obligated to sometimes. He goes from saying he isn’t over me yet to then denying that he ever said that to saying he doesn’t still love me, to then saying a week later that he still does deep down, and it just keeps going on and on. I don’t understand why he’s so conflicted for?
Why is my ex so hot and cold with his feelings?
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