Why does he call me but when he gets off the phone he says he’ll call me back but never does?

He calls me everyday but he never calls back when he says he will. I’m left hanging a lot. He’ll call and we’ll talk and then he will say, “hold on I’ll call you right back” and never does lol I’ll always see him on Instagram though

Why does he call me but when he gets off the phone he says he’ll call me back but never does?
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