For Wake me up (Quotev)

You sit in the living room of Tony Stark's enormous house, enjoying a small get-together between the Avengers. Having been Steve's best friend since he was found in the ice, you're included in almost every event that consisted of the super crew. Said crew loves hanging out with you, and you share a mutual dislike for Loki.
"Alright, guys. We did it again," Tony begins. "We fended off another horrendous attack of alien monsters. I think we've earned another celebration."
"Any reason to throw a party, right, Stark?" Natasha comments with a smirk.
"Exactly!" Tony agrees. "And I've been thinking about the entertainment. My stereo system is the best, but I want to kick it up a notch."
Everyone waits for Tony to continue. Your heart beats rapidly as he looks at you.
"We just so happen to have a musician in our midst," he grins. Your eyes widen. Yes, you love music, but you've never played on a stage or for anyone outside of your family.
"Me?" you question.
"Yes, you! You've been dying for a gig and Steve mentioned how great you sound. You're gonna be the musical host for my next party," Tony explains. Steve smiles and wraps an arm around your shoulders. Bruce claps his hands a few times. Natasha raises a brow, Clint grins.
"I wish to hear the maiden sing," Thor requests. You being shaking your head, but Tony interrupts.
"Yeah, let's have a practice run," he agrees. Thor and Clint rise to help Tony gather electrical equipment, such as a microphone, a stereo for background music, and amplifiers. Tony hands you the microphone and gestures for you to stand. You rise slowly, thinking about what they're asking you to do. Deciding that you have no way out, you grin confidently and prepare for the song to start. Tony powers up the sound system and the chords for Paramore's "Crush Crush Crush" (1) begin playing. You close your eyes to ease the tension and begin singing.
As the song ends, you lower the microphone and look at your audience. Six people are staring at you, mouths agape and hands clapping together. You feel yourself blush as you smile and try to sit back down.
"It's settled, then," Tony decides. "Shea will be our music performer."

The following night, the Avengers are back in Stark Tower, along with Phil Coulson, Maria Hill, Nick Fury, and a couple hundred random strangers that no one actually knows but Tony invited anyway. You're backstage with Clint and Steve, preparing for your seemingly endless concert. Clint is helping set up the technical stuff and Steve is giving you moral support.
"You'll do great," Steve insists, giving you a friendly hug. You give a smile in return as Clint finishes setting up.
"He's right," he agrees. "You sound awesome. And if you start to freak out, remember that everyone in this tower will be drunk within an hour so they won't care how you sound anyway." He gives a grin and walks off. You can't decide if his comment is encouraging or terrifying.
About three hours into the party, there's an enormous crash from somewhere close to the top of the tower, and a flash of blue-green light. Cursing the gods for ruining your first gig (it had been going so well, too!), you run off stage to find Steve, the only person who could make you feel safe.
"Stark says it's time to suit up," Steve says when you find him.
"So that was an attack?" you inquire, watching the party-goers scramble for safety. Steve nods, pulling his blue cap-mask over his face.
"Agent Coulson and Agent Hill have been put in charge of getting everyone to safety. Find them and do whatever they say. I've got to go help fight off whoever attacked us," Steve says. He places a hand on your face and gives you a small smile before running off. You're stunned for a second before you see Maria ushering people to lower floors of the tower. You follow her lead and head down to safety. You only pray it isn't Loki - he'd been the Avengers' strongest enemy, as far as you knew.

Some hours later- you weren't entirely sure how long it had been, but you could tell it hadn't been easy judging from the crashes and booms from upstairs- JARVIS's (2) voice came through the intercom.
"Master Stark as asked me to inform you that it is safe to move back upstairs. The threat is gone."
"Alright, you hear him," Agent Hill says. She and Coulson begin leading the crowed back to the main party room. You begin looking for Steve, hoping he wasn't too hurt from the fight. Iron Man flies in, standing on the stage you had performed on earlier.
"I have good news and bad news," he tells the crowd. "The bad news is that Loki invaded Earth and tried to kill us. Again."
Gasps ripple through the crowd. Young girls clasp their hands over their mouths, men wait to see if the Avengers have taken care of the problem.
Iron Man continues. "The good news is that we have defeated him and his army, and have taken him captive."
Hoping that means that the crew is safe, you run through the crowd in search of Steve. You find Nick Fury first and decide to ask.
"Have you seen Steve?"
"Captain Rogers is in the infirmary. He got a little beat up trying to hold off Loki's army. Agent Hill will take you there," Nick replies. Maria nods and gestures for you to follow her.
Steve is sitting in bed, insisting that he's okay as Pepper bandages his arm.
"He got hit pretty bad in the arm. It's pretty deep but it should heal in its own time," Pepper explained, noting the look of worry crossing your face. As she leaves, you sit beside Steve.
"Are you okay?" you ask.
"I'm fine, Shea. Sorry we ruined your first concert, though," he smiles. You laugh lightly and shake your head.
"I'm not worried about my concert. I'm worried about you," you reply.
"I'm okay, really," Steve presses. "Just a little sore."
"So it was Loki?" you question.
Steve nods. "He created a new army out of an old, ancient race. Fairly easy to beat. Loki's locked up now."
You nod in understanding, watching Steve carefully. You're both quiet for a minute before Steve speaks again.
"Shea?"
"Yes?"
"I love you."
Your eyes widen. You've loved Steve for as long as you can remember, and while you've been best friends for all that time, you had no idea he loved you back.
"Really?"
Steve smiles and leans closer to you. You close your eyes as his forehead rests against yours. He presses his lips to yours and you respond instantly, wrapping your arms around his neck. He smiles as he pulls away.
"I love you too," you whisper.
"Will you be mine?" he asks, still smiling.
"Always," you agree.

(1) First song I thought of.
(2) I usually spell it "Jarvis" but I've seen a lot of writers use "JARVIS" so I'm not really sure which it is.