How did the boys show their feelings as emotion overcame them?

The boys feelings were evident in their tears.

"Stop it!" Johnny gasped from between clenched teeth. "Shut up about last night! I killed a kid last night. He couldn't of been over seventeen or eighteen, and I killed him. How'd you like to live with that?" He was crying. I held him like Soda had held him the day we found him lying in the lot.
"I didn't mean to," he finally blurted out, "but they were drownin' you, and I was so scared..." He was quiet for a minute. "There sure is a lot of blood in people."
He got up suddenly and began pacing back and forth, slapping his pockets.
"Whatta we gonna do?" I was crying by then. It was getting dark and I was cold and lonesome. I closed my eyes and leaned my head back, but the tears came anyway.
"This is my fault," Johnny said in a miserable voice. He had stopped crying when I started. "For bringin' a little thirteen-year-old kid along. You ought to go home. You can't get into any trouble. You didn't kill him."
"No!" I screamed at him. "I'm fourteen! I've been fourteen for a month! And I'm in it as much as you are. I'll stop crying in a minute... I can't help it."