Angst, so watch out.
Argue
"I don't care!" yelled Kurt, his throat sore from screaming. He slammed the bedroom door shut loudly, then leaned against it, panting with fury. A moment later he sank down to the floor, tears beginning to stream down his face, as terrible thoughts flooded his head, as they tend to do in situations like this. What if Blaine will be torn away from him again? He won't be able to make it through this time. How could he stand it all over again? His arms wrapped around his own limp body, shaking violently with silent sobs.
Kurt's heart ached for the thought of being alone again, crying himself to sleep alone, waking up alone, day after day…
This couldn't keep going, he decided. This had to be fixed.
But how? It seemed that they both were broken beyond repair, too far away to be pulled back to one another.
They were no longer who they used to be, no. They were older now, both physically and mentally. They weren't as blindly in love as teens often were, and they'd argue. A lot. And now, Kurt knew this had to end. Grabbing the doorknob for support, he rose to his feet, trembling still, one hand left around his torso, as if trying to keep himself from falling to pieces.
He opened the door quietly, creeping through the hallway, walking slowly to the living room, where he found Blaine sitting on the couch, his head in his hands. Kurt was shocked to hear him whimper, his entire body shivering with tears. Blaine's usually perfectly gelled hair was a mess, his hands gripping it so tight he must've plucked out some of it. Looking closer, Kurt could see his face glisten with tears, red from crying.
Now, Kurt ran towards Blaine, unable to stand seeing him cry like that. His arms grasped and lifted Blaine's limp body from the couch, clashing them together, as if making sure they'll never be able to break apart. Blaine startled, looking up with watery eyes.
"I'm so sorry, Kurt, please-" he choked, hoarse, and burst into tears again. Kurt gripped his face, staring deeply into his eyes.
"No," he said. "I'm sorry. This has to stop, Blaine. I can't take it anymore."
Blaine's eyes widened with fear. "Are… are you breaking up with me?"
"No!" called Kurt, scaring them both a little. "No," his voice softened. "I am letting you know that I'm not giving up on you. I'm in love with you, Blaine. I don't want to see us fall apart. And I'm going to keep on fighting for us."
Ugh, the ending seems stupid. I don't know.