The past will often attack the present with the pain of memories.

The darkness of night crippled in Steve's room. He kept tossing and turning, his brain unable to shut off.
This was the time of the day Steve hated the most. This was the time of the day when all of his memories to haunt his mind; the sound of guns like it was yesterday, the touch of Peggy's lips as the wind blew in his face. The thought of Bucky sleeping next door brought comfort to his mind. It was the only feeling he had from his previous life left, the life of Steve Rogers.
The Avengers mansion was deadly silent. Steve could hear the clock too loudly in that very silent night, wishing for the sound to fade off completely.
It was thee and a half hours after midnight, when Steve heard a noise, a shriek. Bucky.
Steve got out of his bed instantly and was in Bucky's room in a matter of seconds.
'Buck? You alright?' - Steve knew he was not. The blonde sat next to Bucky on his bed, his hand on Bucky's shoulder. He could feel his friend's cold sweat. Steve reached his hands out and hugged Bucky, 'you're alright. You are here with me. Remember? I'm here'.
His breathing was heavy, as if he was reaching out for air and failing.
'I killed him, S-Steve, I killed him' , Bucky was not shouting. He was saying this quietly, hardly audible even for Steve himself.
'You didn't Buck, it was not you'
Bucky kept sobbing. Steve was staring into darkness, holding crying Bucky in his hands. It broke his heart to thousands pieces to see Bucky like this.
When Steve realized Buck was not going to relax, he stood up from the bed, 'let's go for a ride'.
He knew how the constant movement made his friend feel safer, easier.
When they got out, the cold breeze hit in their faces. Both soldiers got in the front of the car.
The rest if the night was a blur for Steve. He turned on the playlist of 40's jazz, and soon, Bucky's hard breathing got back to normal. Steve just kept driving.
The sun was already rising when Steve parked next to the Avengers mansion. He turned off the car, put his head back and fell asleep immediately.

//
A/N
Thank you so much for reading. I have been inspired by reading some Marvel Headcanons. I hope you like this and if you do, vote for the story and/or comment.