Disclaimer- I don't own this song or these characters (sigh)

All of Me by John Legend

What would I do without your smart mouth,

Drawing me in, you kicking me out

Got my head spinning, no kidding
I can't pin you down
Whats going on in that beautiful mind
I'm on your magical mystery ride
And I'm so dizzy, don't know what hit me
But I'll be alright

Leo Fitz couldn't process the events that had happened some days previous. Jemma Simmons, his beautiful Jemma, had nearly ripped his heart out with her actions. He hadn't realized it, but he had fallen for her. His slightly neurotic, insane, brilliant, determined lab partner and his dearest best friend.

Without her, there was no Fitzsimmons. Just plain, socially awkward Fitz. She was his better half, and helped to make him a better person and a good scientist. He had been by her side through everything, and it nearly killed him to see her plummet to her near-death.

Even though he was grateful Ward had thrown himself out of the Bus to save Jemma, he was constantly angry at himself for not being brave enough to do it himself. He knew Jemma was thankful for both of their efforts, but he will regret his decision for a long time.

Fitz sat brooding on his cot at some ungodly hour of morning, wearing his pyjamas. He was replaying the moments of terror in his head, analyzing his actions and what he should've done instead. He was so deep into his thoughts, eyes unseeing, that he hadn't noticed a dark figure standing in the doorway.

Suddenly, as if he had sensed the person telepathically, his head snapped towards the door. He sucked in a sharp breath, disbelieving his eyes. It was Jemma standing in his doorway, wearing her favourite blue nightgown, with a quilt draped over her torso.

Fitz stood up quickly and took one long stride towards the door. She met him halfway, throwing the quilt off her shoulders and wrapping her now unoccupied arms around Fitz' back. Fitz returned the gesture, enveloping his arms around her and pulling her tighter to him. She laid her head against his chest, next to his rapidly beating heart, sighing in the process.

He noticed how small and fragile she was in this state. Even though Fitz had known her for many years, he knew that she always refused to show weakness when around other people, especially him. "Because" she claimed, "you'll never look at me the same way again." Fitz couldn't help but realize the factuality in her statement some years earlier.

He now looked at her with feelings of regret and loneliness, feeling partially responsible for the whole poisoning/suicide situation. He should've made sure that proper preventative measures were put in place when handling dangerous weapons and that she was never left alone in the lab.

He felt Jemma shift against him and looked down to see a pair of hazel, but red-rimmed eyes looking into his, almost if trying to search his soul. She spoke in a quiet voice, "I know what you're thinking, Leo." He ignored the fact that she rarely called him by his first name and replied, "Of course you do." Jemma stiffened in his arms, slightly offended and put off at his answer. Fitz immediately regretted those words.

She released her arms from around him, scooped up her fallen blanket and sat on his dumpy unmade cot. He turned to look at her, awaiting some kind of sarcastic yet factual response that was the norm from her. She said nothing, and simply sat in stony silence. Fitz was once again wondering what he did wrong. Had he done something to upset her in her emotional turmoil?

She finally spoke up softIy, "I know that you blame yourself for what happened. That's why you can't look at me." She stared at him expectantly. Fitz took a deep breath, before blurting out, "I love you." He felt like the weight of the world had been lifted off his shoulders, before she had even replied.

She smiled, the corners of her tired eyes lifting. Leo took that as a sign, moving towards the bed. He leaned down and cupped Jemma's cheeks softly, before placing a light kiss on her lips. She reached around his back to lightly grip his shirt, wrinkling it slightly between her fingers. She clutched him closer, and Fitz moved his arms to around her shoulders.

After a few seconds, or minutes, Fitz wasn't quite sure, they pulled away. Catching their breath, Jemma rested her forehead on Leo's. "Stay, please?" Fitz whispered. "I'll never leave if you don't want me to," Jemma whispered tenderly. Inching to the other side of the bed, Jemma lifted up the blanket and allowed Fitz to sneak in beside her.

They both lay their heads on the pillow, their faces almost touching. Fitz adjusted the blankets one last time and Jemma reached her arm over Fitz' body and brought her head into his chest. Fitz covered Simmons' feet with his own and rested his hand on her head, stroking her hair lightly. They lay like that, intertwined, until each of their breaths became slow and even.

Just before they drifted off into the darkness, Jemma whispered very quietly, "I love you too."

My head's underwater, but I'm breathing fine
You're crazy and I'm outta my mind
Cause all of me, loves all of you
Love your curves, and all your edges
All your perfect imperfections
Give your all to me, I'll give my all to you
You're my end and my beginning
Even when I lose, I'm winning
Cause I give you all of me
And you give me all of you