After all of the titans were killed that were trapped, Armin and you went in the carriage together back to the Survey Corps Headquarters.
Armin still had a red face and puffy cheeks from crying.  He was also holding onto your arm like a koala holding onto a tree for dear life.

"Armin, I'm right here calm down.."

"I know but I was so scared that you died and I-"

He tightened his grip on your arm and nuzzled into your shoulder

"I couldn't live without you (Y/N),"

"And I couldn't without you!"

Then once you got back Armin took you to the infirmary despite your protest saying you were fine.
"(Y/N) I don't care if you feel ok I heard that an expedition isn't far away and I don't want you injured on that one too!!"

"Fine. Only because I love you!" You pecked him cheek while he help support you to a bed.

A nurse came over awhile later and tended to your wounds. Armin's at down next to you with your hand in his.

"Armin is it true an expedition isn't far away?"

"Yeah I uh heard Commander Erwin talking about it!"

"Oh.."

You rubbed your neck nervously

"Is something wrong?"

"Yeah I'm just nervous for this expedition,"

"Oh.. I'm sure it will be fine!"

"Alright you can go now," the nurse said

"Thank you!"

You waved good bye as you and Armin left hand in hand.

Time skip!!!

Later that night everyone was a bit more roudy than usual.

"Get Armin do you want to go back to the dorm and read?" You asked

"Sure!"

Armin and you left. 

Once back at the dorm you both got up on your cot, wrapped up in blankets, and cuddled.

Armin sat behind you and wrapped his arms around your waist. He placed his head in the crook of your neck.

"I love you (Y/N)."

"I love you too Armin!"