I had a habit of walking at night at that time in my life, not unlike now. Except that I did it in populated areas, which is far more dangerous.
I was in my late teens.
I was deeply depressed and I walked to deal with my emotions.
I had long hair back then too. I started growing it long when I was 17. I kept myself starved thin and I did not look particularly boy like when seen from behind.
It was dark. I was on a long walk, alone on that road.