Disclaimer: I do not own Shingeki no Kyojin (Attack on Titan) or any of the characters..
Third-Person P.O.V:
~A few years ago~
You have known Eren since you guys were kids, you have been through everything together. Mikasa and Armin were your best friends, but Eren, he was something more. He never really knew how you felt about him even though Mikasa and Armin did. They kept it a secret at your discretion. Being around Eren always gave you that funny feeling inside, like you were going to burst if he ever left you for too long. But all of that changed when the Titans showed up.
The Titans attacked everything, they have no feelings except for hunger. Your family made it out safely but Eren's mother didn't. She was stuck under the rubble of their house when it collapsed. You Eren and Mikasa tried your best to get her out but all of you were taken away before you could get her out. You were pulled away as you saw Eren's mother being eaten by a Titan. You knew there was no way you three would be able to get her out but Eren was determined so you were to.
You all met up with Armin and his Grandpa on the boat but something seemed different with Eren, he wasn't talking and he didnt even look at you when you tried to talk to him. You and Mikasa decided it was best to give him his space.
~Present Time~
It has been a few years since you saw Erens' mother get eaten by a Titan and it still haunts your nightmares to this day. But you tried to put it behind you as you were training with Mikasa. You were determined to get stronger so that you never had to leave another person behind. But something has been wrong since that night. You barely see Eren anymore and when you do he doesn't acknowledge that you're there. You feel like he blames you for what happened, but how could it possibly be your fault you were a child?
You decided to talk to Armin about, given he is the only person that actually takes to Eren on a regular basis. You told him how you were feeling and what you thought. After he processed it for a while he told you he would talk to Eren about it. You two went your separate ways and didn't see each other again until dinner.
~Before Dinner: Armin talking to Eren~
Armin knocked on Eren's door a few times, after what seemed like forever he finally answered.