What's the meaning of "Hassan milled about the periphery of my life"?

Question

From The Kite Runner:

Hassan milled about the periphery of my life after that. I made sure our paths crossed as little as possible, planned my day that way. Because when he was around, the oxygen seeped out of the room. My chest tightened and I couldn’t draw enough air; I’d stand there, gasping in my own little airless bubble of atmosphere. But even when he wasn’t around, he was. He was there in the hand-washed and ironed clothes on the cane-seat chair, in the warm slippers left outside my door, in the wood already burning in the stove when I came down for breakfast. Everywhere I turned, I saw signs of his loyalty, his goddamn unwavering loyalty.

What's the meaning of "Hassan milled about the periphery of my life" in this passage?

Answer 1

One meaning of "to mill" is "to move about in a disorderly or aimless fashion", especially in a circular movement. The "periphery" is the edge. So basically, the section is just stating that Hassan was in their life, but not in a purposeful or meaningful way.