Your Revelation is My Downfall (слэш)

“Steve—” Bucky stutters.
He can’t breathe. He can’t move. Steve Rogers is standing in his kitchen. Alive.
Bucky grips the counter to steady himself. He must be dreaming. Because Steve—his Steve—left him behind.
***
Steve thought he made the right choice.
He danced with Peggy, lived with her, kissed her—wrapped himself in the life he always believed he wanted. But at night, in the quiet, it wasn’t Peggy’s soft touch he ached for. It wasn’t her warm brown eyes he saw behind closed lids. It was Bucky. It had always been Bucky.
Regret claws at his ribs. He made a mistake. A terrible, selfish mistake. And now, he’s come back.
***
The day Steve vanished, something inside Bucky shattered. When an old man took his place, the world blurred into nothing.
Steve was gone. Gone in a way Bucky could never fix, never follow.
He grieved. He bled. He forced himself to keep breathing because Sam reminded him how. And just when the ache dulled into something manageable, Steve returns.
The air is ripped from Bucky’s lungs. His hands shake, his heart slams against his ribs.
This should be a miracle. A second chance. So why does it feel like a curse?