Hi everyone, this is my first short-story that I've posted on YWS. Please read it and please suggest many changes to help change it for the better. It is my first story I've posted here so constructive criticism would be greatly appreciated!
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He crawled out of his bed, waking to the dim flame that flickered in the dark room. His legs ached and stomach sore as if he had been walking long distances, yet he had been asleep for 129 days. What had he been doing whilst he dreamt? He rubbed his eyes once, and then memories filled his empty mind-
A girl, a love. Her arms around him and her words, ‘I love you, I care for you, I will never let you go.’ He felt the same way. A meadow flooded with light and a picnic rug of the lush green grass was where he was when he looked around.
Where was she?
He would never let her go…
He rubbed his eyes again, now he was back in the dark room with the dim flame that flicked in the crisp air of night. Then he looked down, to the cold concrete floor…stained with blood.
He followed the blood-stained path out of the room; the flame followed becoming brighter with each step. The hallway was covered with old rotting doors and cobwebs hung loosely of the ceiling. Then-
A girl, his love. She walked down the hallway and into a room…
There she sat, on the couch, infront of the warm fire.
The warmth felt good on bare skin, it was life-giving.
He sat there, next to her, and looked deeply into her deep, brown eyes that reflected the fire – life-giving and warm.
He would never let her go…
He opened his eyes again, and found himself standing infront of the warm fire, which was slowly dying. The flame that followed him lit the room up, giving it warmth, warmth that reminded him of her. Surprisingly, the room didn’t feel lonely, but it felt like something – or someone was dying, losing warmth, losing life. He walked around the room and-
-there she was.
The blood-stained floor led to her. He body lay there, still and motionless. He dropped to his knees, crying. Each tear filled with sadness and a single question: who did this?
The blood-stained floor didn’t stop at her lifeless body. The stains circled round to form another blood-stained path parallel to the previous. He started walking along it, hoping to find who had done this. The flame followed.
He ended up back in the neglected corridor-
No, it could be-
He ran quickly through the hall to the other end. To the dark room in which he began. The flame behind him followed him into the room, lighting it up.
Now he could see.
The second path of blood stains led…
…to his bed. What had he been doing whilst he slept?
Then-
A spell, a curse, a force.
A knife in his hand.
The hallway. Then the couch.
The force had possessed his body. Then with a knife in his hand, he turned his head…
…to her.
He rubbed his eyes, which were now shedding tears of grave sorrow and sadness. His heart felt stone-cold as he lay in his bed. He closed his eyes, knowing his dreams were going to return as nightmares.
Why had he killed her?
He lay in bed as sadness and sorrow settled inside him. He lay there, quiet and still, as tears of hatred for himself rolled down his cold face.
The flame floated above him, filling the room with familiar warmth, he felt he was undeserving of. Ten words echoed from the flame…
…I love you and I will never let you go.

), yet you have a lot of warmth in this paragraph even though it isn't a flashback. The dying fire does feel appropriate, but I think it would be more fitting if you used antonyms of warm here - cool, chill, that kind of thing. Just a suggestion, but it would give more variety and perhaps make it more eerie.