what is the relationship between Eliezer and his father when he says ''i ran to look for my father" in section 5?

Elie truly loves and is worried about his father.

I ran to look for my father. At the same time I was afraid of having to wish him a happy year in which I no longer believed. He was leaning against the wall, bent shoulders sagging as if under a heavy load. I went up to him, took his hand and kissed it. I felt a tear on my hand. Whose was it? Mine? His?