He is not a boss and some how micromanage me around order and helps me open pizza bags when I don't want his help?

Is he harassing me. I do not like him at all. Very mean and order me around at my job when he is the same title. Delivery.
What to I do. I tell him I got it. So rude!
He is not a boss and some how micromanage me around order and helps me open pizza bags when I don't want his help?
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