When Eleven escaped from the Lab, you were with her too, helping her. Thought you were not her sister, you were his sister, even if not by blood, but for her you were. You were just 4 years older after all.
At 15, you escaped with Eleven, and accidentally meet the other kids. Mike, Dustin and Lucas. They were 11, just like El. Then you met Steve Harrington, he was two years old than you, so nothing much, but he was arrogant.
At 16, the Upside Down tunnels spread under Hawkins and another creature pops up, connecting to Will's mind, the Mind Flayer. When the gate of the Upside Down close, the city start breathing again. And the jerk - also called Steve - change. He helps fight the Demogorgons, helping Dustin and the others. He's still a bit cocky, that's why every word you exange with him is followed by some stupid, massive argument.
At 17, Russians secretly opens another gate to the Upside down, and while you thought Hopper was dead, you found comfort in Steve's arms, growing way too attached to him. It wasn't heated anymore, and not even friendship, but... something else, something way too deeper for your liking.
At 18, you discover that your powers are too deep for you, and fear climbs through your bones. When Vecna start to create problems, you made your decision. You start avoiding Steve, breaking 'whatever-you-had' with him, fearing that you'll only hurt him. Hopper is alive, and you and El are over the moon.
At 19, you, Eleven, Mike, Will, Lucas, Dustin, Max, Joyce, Hopper, Robin, Nancy, Steve, and others team up for a final fight with Vecna. You still hadn't cleared things with Steve, or so the others thought...
One day you were all relaxing at Hopper's - so yours and El's - place. Suddenly, your dad (Hopper) stops right in front of you, holding a videotape in his hand. "Can you explain what are you doing in this video?" I puts his hand on his hip, giving you a pointed look.
The video? it was you and Steve having a... great night to say at least. He was shirtless above you, your back arching against him... You got it.
"That's not me" You say, keeping from glaring at Steve. In reality? you and him have cleared... well, more or less. You were still afraid of hurting him, but a few hook ups wouldn't hurt, right?
"That's not you?" Hopper says skeptical. Mike looks ready to argue, Will looks at you confused and Dustin and Lucas wereready to intervene if Max wouldn't have nudged them in the side. Robin and Eleven looks between you and Steve speechless. They thought the thing between you two ended years ago.
"Hold on-" Steve tries to say, but Dustin cuts him off with a grin. "You got caught." he grinned like he wanted popcorn.
You throw your head back, scoffing, while Steve puts his hands on his face, looking like he's regretting all the things he has done in his entire life.