When You Leave/An Ereri Fanfiction

Intro

Eren ran into the crowded street, his teal blue eyes scanning the bustling crowd.
"Mom!?" He called, hoping he'd at least get some attention (then again, what ten year old boy calling for his mom wouldn't?).
He continued to sprint further into the crowd, where it soon grew quiet, and the surrounding mood made the brunette feel sick.
Eren pushed his way through the people who were packed tightly together, making it next to impossible to see what everyone was looking at. So he called again, "Mom..?"
his high pitched voice seemed to trail off as he approached who he thought was his mother. The woman was lying in a broken, smashed up, white little car. Its entire front half seemed to have been replaced by a huge semi; the driver of which was missing from the scene. Carla, Eren's mother, slowly turned her head to look at her son.
"Eren," She started, "I love you."
Those last few words were ones that Eren hear a lot.
When his dad died from an overdose:
I love you
When his aunt died because she was shot:
I love you, Eren.
When his sister, Mikasa, grew sick:
I love you so much
Hell, even when his teacher commit suicide before class:
I love you (Eren wasn't sure who she was talking to, but he still heard I, Love, and You)

But... This is his mother. His only friend. He remembered how they used to shop together, take care of animals at the local pet shelter, cook meals for the homeless... Why now? Why did she have to die, too?! Eren thought, but then he quickly took it back, no.. this is my fault. I was a burden on her. and she's dead because of it.
Eren felt his knees buckle, but before he could actually fall, a hand grabbed his shoulder. He looked up. A male, who appeared to be in his early twenties, looked down at the brunette. In Eren's world, the man looked scary- thin, icy blue eyes, slick, raven black hair... But what shocked Eren most was the small smile and look of empathy that was loosely on his pale face.
"I know how you feel," the man said to Eren. And with that, he left, leaving Eren at the the front of the still quite, but now smaller, crowd.