Caleb was a very antisocial kid. So when he lost his map at the high school, he had a break down. But when you came to help him and led him to the lunch room, he seemed much better. And after that, he couldn't get you out of his head.
He had asked his mom to go back to school shopping with you, secretly just wanting to spend more time with you. But his mom also suggested that you could help him find a new backpack. That is not what the plan was.
So when you went to Dick's and picked out a backpack, he complained that it wasn't the right one. "This is not my backpack!" He said in a distressed tone, picking up the rolly backpack. "The texture is different! And the zipper doesn't make the right sound!" He complained, his breathing starting to get faster. Anxiety mosquitoes started to fly around him, his hands shaking a bit.