Why he's playing?

This guy, when we talk on the phone, he acts like this : today he is in the mood for talking and leads the conversation- tomorrow he is all lazy and talks as if he is too tired or sleepy. And on the days when I have acted (purposefully) as if I was sad/not in the mood for talking and I could barely speak on the phone, I noticed how he would lead in our conversation, he would ask me what was wrong, why I was sad. And this would last until I "felt better" the next time. In the moment he would notice I "felt better", he would go back to being lazy or tired on the phone.
Why does he play me? Should I confront him about this? Or do something else?
Why he's playing?
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