Dean sat in the strength of Cas' arms for a moment before taking a hitching breath and standing. Cas stood with him, his arm still around Dean's shoulders. Castiel had tears in his eyes; Dean knew the boy had come to love his mom just as much as a son would. Dean squeezed his arm before realization suddenly set in.

"Shit...I gotta...I gotta go get Sammy..." he murmured, and began to hurry away.

"Wait, I'll come!" Cas called. Dean stopped and turned.

"What about class?"

"Ah, screw class, Dean. You need me more!" He watched as Cas raced back into the room, and came back out a moment later, his bag over his shoulder, his books clutched to his chest. Dean couldn't even muster a smile, and later it would cross his mind that Cas, the nerd King, had ditched class for him. But later wasn't now. Now, he needed to get to Sammy. The two hurried out the door, and into the Impala. Dean made it in record time, having run two red lights and three stop signs, but not even Cas had tried to tell him to stop for them….or slow down, for that matter.
Dean didn't bother stopping at the front office- he had Sammy's schedule memorized. He just bolted down the hall, Cas on his heels. But they didn't have to go to his brother's classroom. Sam was sitting against his locker, head in hands, his jacket Mary had gotten him clutched to his chest, sobbing. Dean dropped to his knees beside his brother and pulled him to his chest, tears forming in his own eyes and dripping down his cheeks.

"Shh , shhh," he murmured. "S'alright, Sammy, s'alright…" He rocked them slowly, pressing a kiss to his brother's temple. He felt a strong hand on his back and he looked up with blurred eyes to see Cas, tears sparkling in those blue eyes, jaw set. Sammy clung to him and sobbed, burying his head in Dean's chest. Dean took in a hitching breath, jaw quivering, and closed his eyes. He couldn't stand to see the pain in those imploring blue eyes, the tears staining his shirt….He shook his head and pulled his brother into his arms, and headed to the door. He heard murmurs of "I'm so sorry" from passing teachers. Apparently they'd all heard the news. He ignored them, and headed to the Impala, settling his brother next to him. Sammy stopped sobbing, but tears still leaked from his eyes and he had curled up on the seat, head resting on Dean's thigh. Cas silently took the back seat, no questions asked.
The drive to Cas' house was agonizingly long, and painfully silent. Dean swore he could hear his heart beating in his chest. The only sounds breaking the silence were Sam's hitching breaths and Dean's choppy ones.
Once he pulled up to the curb, Dean got out going to walk Cas to the door. Dean shuffled on his feet, looking at the ground. He could feel his cheeks heating and he really didn't know why. All he knew was that once he looked up, he was lost in oceans of blue.

"Cas…I…uh…." He stumbled over his words, his eyes never leaving Cas'.
"I just wanted to say thanks," he finally got out. Cas nodded and gave a light smile, reaching out to squeeze his shoulder.

"It's no trouble at all, Dean," Cas said, giving his shoulder a pat. They lingered there a moment longer, and Dean watched Cas' cheeks tinge pink.
"Call me if you need anything, okay?" Cas said, pulling his hand back.

"I will. Promise." He nudged Cas' shoulder and gave a tiny smile, surprised he could even muster that. He was at the end of his rope. Cas nodded and then glanced at the car.

"Go be with your brother, Dean," he said. Dean nodded, squeezed Cas' shoulder, and jogged back to the car. He got in and watched as Cas opened the door and walked in his house.
He didn't know how much longer he sat there, staring at Cas' closed door, but he did know that there was something inside him telling him to go back, be with Cas. It was so strong it was staggering, and had he been standing he would've fallen.
He shook his head and began the drive back home.