Backstory

Peter was engaged to Liz Toomes after dating for 7 years, Peter and Liz were 24 and even had their own mansion together but one day peter came home from work and caught Liz cheating on him with the person who bullied him all threw highschool, instead of waiting for stupid excuses he left her and never looked back

5 years later Peter is now 29 and has moved on with his life and has been dating MJ for over 3 yearsuntil he ends up running into Liz at a fund raiser put together by Tony Stark

Liz never met MJ so they don't know each other

after Endgame Tony Stark and Nat are still alive and Steve never went back to the past, and everybody knows Peter Parker is Spiderman '

Lyrics are Jar of Hearts By Christina Peri ,

No I can't take one more step towards you
Cause all that's waiting is regret
Don't you know I'm not your ghost anymore
You lost the love I loved the most

Peter was walking through the crowds of people who turned up for the fundraiser concern that Tony and Pepper Stark-Potts had Put together to help people who lives was destroyed by Thanos with special guest star Christina Peri, hand to hand with his girlfriend of 3 years MJ smiling and laughing and generally enjoying themselves, until Peter froze, smile instantly being washed of his face when his eyes locked on to someone he once knew.

"Hey Loser" MJ said worriedly as she placed her hand on his shoulder and he jumped slightly. Peter turned to her, his face was rather pale, like he had seen a ghost

"Are you alright?" Peter just waved her off a bit dazed.
"Yeah, yeah I'm fine. I just thought I saw someone I once knew for a second

Peter looked around trying to find her but she was gone, he frowned and shaked his head, he was probably seeing things or his mind was playing tricks on him, last he had heard from no other then Mr Toomes (he was never the vulture) who was very disappointed in his daughter, was that she after being known as the finance who cheated on Spiderman in the papers and on the news moved across the world

Peter turned to leave after grabbing a couple of snacks and drinks for himself and MJ ,when he accidentally bumped into someone.

"Oh my gosh! I'm so sorry I didn't see you—"Peter face going bright red, god he was so embarrassed
The women's eyes widen in recognition

.
"Peter?"

Peter groaned inwardly he never wanted to see her again, but he smiled weakly and tried to act as if seeing her again didn't bother you.

"Hello, Liz."

I learned to live half alive
and now you want me one more time...

"I cant believe it you! Its been god how long? Its great to see you." she flicks her hair across her shoulder and gives peter a smile, the smile that used to make he's heart skip a beat and he's knees feel week But not anymore, what on earth was she even doing here, she was supposed to be across the world and Mr Toomes never mentioned she was back in New York

\*Flashback\*

"Liz I'm home!"

Peter removed his coat and tossed it onto the back of the couch before making his way to the stairs, usually Liz was waiting on the coach for him to come home and always asked him about his day so it was odd she wasn't there, when he arrived at the bottom of the stairs, he noticed a pair of adidas sneakers that he knew wasn't his, for one he didn't own any adidas trainers and for two they looked way to big to be for him
Dread started to pool in the pit of his stomach as he quickly ascended the stairs. As he neared the bedroom door he could hear the bed rustling and creaking. As well as moans of pleasure. Peter paused in front of the door. His hand hovering above the handle. he was afraid of what he would see when he opened the door. he prayed that what he was hearing was just the television or something and not what you thought it was.

Before he could change his mind he swung the bedroom door open causing it to slam against the wall to find his fiancé in bed with another men, and not just any man Flash, the boy who had made his lie miserable all threw high school.

Liz eyes widened and she immediately tried to scramble off the bed and Flash just sat there with a smirk on his face
His eyes began to sting and his vision blurred as hot tears spilled down his cheeks. Peter raised his hands to his mouth to muffle the sobs that threatened to escape.
"Peter ! This isn't what it looks like." Liz said as she quickly covered her self up getting up from the bed and began walking towards me ,he shook his head and took a step back before running down the stairs and out the door.

" Peter" Liz shouted after him but he ignored her, before he made sure no one was around, and put his masks on swinging from building to building , Leaving the mansion that Tony Stark and Adrian Toomes had brought them for the engagement party

And who do you think you are
Running around leaving scars
Collecting your jar of hearts
And tearing love apart,
You're gonna catch a cold
From the ice inside your soul
So don't come back for me

Who do you think you are?

Peter didn't even know where he was he or where he was going, had stopped swinging from buildings a while ago and decided to take a slow and steady walk after removing his mask ,he was just trying to get as far as possible away from the memories Peter hastily wiped the tears that was still falling down his cheeks. Peter was so distracted by everything that happened, (he couldn't believe his one true love would cheat on him like that with his worse enemy, he thought they was happy with each other, they of course had there fair share of arguments but it never lasted, and all would be forgotten the next day) that he didn't see the car that was speeding towards him as he crossed the road, The last thing Peter heard were tires squealing and glass shattering before he passed out.

...Time Skip brought to you by me...

Peter looked around and tried to sit up but he was in so much pain that he just laid there helplessly waiting for anyone to relieve him of this pain, both physical and emotional
Its was rather quiet until someone busted through the door, Peter looked up to see the avenger's with the exceptional of Thor who was on Asgard and Bruce who was at a science convention, rushing towards him

"Peter "being engulfed into a massive hug.

"You almost died! What the hell where you thinking?" Tony Stark shouted. The events from early crashed into him like a wave and he began to cry. Nat was holding Peter at arms length and looked into his eyes.

"Peter" What's wrong?"

"she cheated on me, I walked in on her and Flash, Peter sobbed Nat's eyes widened in realization, remembering who this Flash guy was, Nat started spewing death threats in Russian, it not like anyone could understand her.

"Oh my god Peter I'm so sorry." Peter buried His face into tony shoulder and cried. Tony just held him the entire time whispering words of comfort, which wasn't much as Tony was never good with emotions

I hear you're asking all around
if I am anywhere to be found
but I have grown too strong
to ever fall back in your arm

It had been weeks since the accident and his phone hasn't stopped ringing, peter just wanted to be left alone

and I've learned to live half alive
and now you want me one more time

Peter looked down at his old beaten up iPhone 4,(Tony had offered to buy him a phone, but he was content with the one he had) as the ringtone starts playing. Liz face appears on the screen. Peter just stared numbly at the screen not even bothering to deny the call, he just let it ring, as he simply wrapped his arms tighter around his knees and starred out the window.

And who do you think you are
Running around leaving scars
Collecting your jar of hearts,
And tearing love apart
You're gonna catch a cold
From the ice inside your soul
Don't come back for me
Who do you think you are?

...Okay we are back to the Present People...

Peter just stared at her unsure of what to say or do, whiles his hand seemed to grip tighter to MJ, who appeared next to him ,Liz looked at him expectantly, I guess she asked a question but i had no idea of what she asked, he couldn't seem to focus she shouldn't be here, she has no right to be here

And it took so long just to feel alright
Remember how to put back the light in my eye
I wish I had missed the first time that we kissed
Cause you broke all your promises
And now you're back
You don't get to get me back

"So what do you say?" Peter just ignored her and just looked past her, when he noticed the avengers was watching him (I guess Karen alerted Tony),his eyes turned back to Liz who was smirking at him and MJ, I guess that what her question was no wonder MJ looked mad and let go of my hand.

And who do you think you are
running around leaving scars
collecting your jar of heart
And tearing love apart
You're gonna catch a cold
from the ice inside your soul
so don't come back for me
Don't come back at all!

"Who do you think you are?" MJ Snapped shoving past me . Liz looked at her surprised, wondering who the fuck this girl was Peter Smiled slightly at MJ and both turned to leave and understanding seemed to cross Liz's face

Liz turned to look at there retreating figure. she reached out and grabbed hold of MJ,
"if I cant have Peter back, then you cant certainty have him, I'm a lot better then you "Liz said

MJ finally snapped, who the fuck did this bimbo think she is

And who do you think you are
Running around leaving scars
Collecting your jar of hearts
And tearing love apart
You're gonna catch a cold
From the ice inside your soul
Don't come back for me
Don't come back at all

Before Peter could even register what was happening MJ's Clenched fist made contact with Liz's cheek sending her stumbling back (MJ is a bad ass). she released MJ'S arm and raised her hand to cover her now red cheek.
The music has stopped and people were staring, But MJ didn't care.
Peter looked at Liz one last time shaking his head before gently grabbing MJ'S hand turning and walking away, joining the rest of the avenger's from where they was happily watching, Nat with a smirk on her face

Who do you think you are?
Who do you think you are?
Who do you think you are?