Prompt: Who knew giving away your best friend would hurt this much.
AU where Stoick never died, but Hiccup still became chief at the end of HTTYD 2

"Will you give me away?" Asked Astrid

Hiccup looked over at his best friend, his right toes in the water and his stump out in the open. "What?"

"I know you have to perform the ceremony, and I can't thank your dad enough for setting my dowry, but I think it would very special if you gave me away."

Hiccup looked at his dirty nails, it was one of those rare moments when both Hiccup and Astrid were free.
"You know, you could walk down the aisle by yourself." Stated Hiccup

"But, I really want you to give me away. You— you are my everything Hiccup, you're my family." Ever since her mother died giving birth to her, then four years after that her father died, the only family Astrid had was her Uncle Finn, then the flightmare froze him, and killed him when Astrid was six. Basically, they only family she's ever known was Stoick and by default, Hiccup.

"If it means that much to you Milady, I love be honored to give you away to Eret." Hiccup said his name like it was poison.
Astrid hugged him tightly "Thank you…" She whispered

"For you Milady… anything."

A week later, Hiccup was waiting outside the Great Hall, wearing his nicest tunic and leggings. He heard a throat being cleared and turned around. His mouth dropped.
"I know… I'm wearing a dress." Blushed Astrid

"You look… wow." Stuttered Hiccup

"You look… Handsome yourself."

Hiccup held out his arm "Shall we?"

Astrid nodded "We shall…"

They started up the steps slowly. Once they got to the doors, Hiccup stopped, looking at his best friend/ex-girlfriend

"I don't know what hurts more, losing you to another guy, or willing giving you up to said guy." Hiccup said

Astrid cupped his face "Hiccup I-" the doors opened and Hiccup yanked his face away. Astrid gasped as she saw the whole village there. Hiccup started down the aisle, and Astrid to take deep breaths to calm herself down.

This— this is the right thing to do, right? Her and Hiccup would have never worked. But her and Eret makes sense. Perfect sense.
But—

Eret treats her like an object, Hiccup treats her like an equal. Eret won't even try her food, Hiccup would eat a bite before spitting it out, or throwing it out the window. She wants Hiccup, she doesn't want Eret.

Astrid stops abruptly making Hiccup stumble.

"Astrid, whats going on?" Hiccup whispered

Astrid looked up at her ex-boyfriend "I— uh— five seconds…" Astrid turns on her heel and books it out of the Great Hall.

"Mate, what did you do with Astrid?" Eret asked

"I-I don't think I did anything." Said Hiccup

Eret took a step towards the door, but Stoick stopped him "I don't think that's a good idea. Hiccup's known her longer… Son why don't you go get her."
Hiccup nodded and ran after Astrid.

Astrid was standing on the beach, breathing heavily. She could do this, she was Astrid Hofferson, she could do anything. She loved Eret, and wanted to be with him!

But there's Hiccup, standing in front of the Great Hall, looking all perfect and handsome, and suddenly she was sixteen and running off to some island to have Hiccup 'alone' time.

She misses Hiccup, and she's not so sure if she ever stopped loving him.

"Astrid…" And there's his delightfully nasally voice, and Astrid turned her head and saw Hiccup standing there in all his glory.

"I couldn't do it Hiccup. I'm Astrid Hofferson, I can do anything! But- but I couldn't stand the thought of being some housewife, expected to be in home having babies while Eret is off fishing."

"It's okay Astrid, you don't have to marry him, okay. W-we can call it off, and everyone'll understand."

"Then everyone'll think I gave up, and Hofferson's don't give up."

"Forget your damn pride for a second and think about what you want Astrid." Shouted Hiccup

Astrid played with the cloth of her new dress. What did she want? She wanted- she wanted-

"I want you." Tumbled out of her before she could stop it. "I want you more than I ever did, and I don't know what to do." Astrid shrugged with tears in her eyes, not because she's upset, but because she doesn't know what the hell to do for the first time in her life.

"Oh Astrid…" Whispered Hiccup

"I love you Hiccup, I don't think I ever stopped…" Because she didn't. Hiccup was her world, her family.

She loved him