Meanwhile, Blaine bought his lunch and was making his way to the table where he sat with Kurt every day at lunch, when a pair of hands grabbed him and pulled him out the door and into the courtyard. Blaine cried out in surprise and whipped around once the hands released him. He let out a sigh of relief when he saw that it was just Mark, with blue eyes alive with anger.
"What happened? Is Kurt okay?" Blaine rushed to ask.
"Kurt's fine. I need to talk to you, Blaine." Mark replied, taking a step closer to Blaine, towering over him. Blaine shuffled backwards half a step.
"I don't like you spending so much time with my boyfriend. I don't like how he eats lunch with someone on the bottom of the social ladder when he should be eating with me, the captain of the football team."
"Kurt and I are just.." Blaine couldn't finish but was interrupted by Mark anyway.
"Just friends?!?!!?" he thundered. "You think I don't see the way you look at him? You think it slips my notice that you are at his house or vice versa every week? I'm saying this one. more. time. Lay the fuck off my boyfriend. He will never be yours, you pathetic price of crap." Mark growled, advancing on Blaine even more. Blaine nodded and turned around, ready to flee.
" Oh and if you tell anyone about our little 'deal', I will be sure to let your feelings for Kurt slip in a conversation, kapiche?" Mark whispered from behind him, shoving him hard from behind and walking in the other direction. Blaine stumbled towards the cafeteria. When he reached the doors, he ran into a very distraught-looking Kurt.
"Blaine!" Kurt cried, flinging himself into a hug with Blaine. "when I didn't see you at our lunch table at all I got worried... I thought something happened to you!" Kurt sobbed into Blaine's shoulder, Blaine patting him awkwardly on the back.
"ahem" a traveling voice said behind Blaine, who turned around to see Mark walking off with a devil glare. He gulped and hastily pulled a sobbing Kurt off of him.
"Do you need to go to the bathroom?" Blaine asked comfortingly. Kurt shook his head, wiping his eyes.
"come on, we have to get to class now, Kurt. " Blaine pulled Kurt begrudgingly to the classroom.

About 5 minutes into class, a note was slid onto Blaine's desk (they had note passing down to an art; they never got caught).
What movie are we watching today?
It was Friday, the day that Kurt and Blaine always spent at Blaine's house watching a movie. Blaine hesitated for a minute before scribbling a reply.
I don't think I can hang out today. Sorry.
Kurt's eyes widened and his mouth opened in protest as his hands furiously crafted a reply.
What? But we always spend Fridays together. I don't even let Mark get in the way of those. Are you mad at me?
Blaine sighed and wrote a reply with shaking hands.
No, I'm not mad at you Kurt. I just...I can't talk about it okay?
Blaine could see the hurt in Kurt's beautiful eyes. With great effort, he tried to focus his brain back on the lesson, but could feel his best friends eyes on him the entire time. He knew that Kurt was going to stop him after class, and started to think of a reply. But at the end of class, the teacher held Kurt back. Blaine seized the opportunity to get to his next class, which he thankfully did not share with Kurt.