Knowing You Saved Me - Steve Harrington

Just a disclaimer - I don't own the characters of course, also this is not going to play that much from the show. Some parts may seem familiar, but others may not.
In this story Steve is a Sophomore in College. Robin and Atlas are both seniors in High School. They are both 18 though, so it's not too weird.
(TW: Swearing, some smut scenes, mental health(bad thoughts and blood), abuse, bullying)
-
Atlas Buckley is Robin Buckleys twin sister. Robin loves her sister, but Atlas suffers with very bad anxiety and depression.
Atlas constantly has battles going on in her head that makes her an outcast and an easy target at Hawkins High.

Steve Harrington, Mr.Perfect, Mr.Never Had A Bad Hair Day In His Life, and of course who can forget Mr.Popular. The guy who used to bully almost anyone who wasn't in his friend group.

Atlas remembers him, everyone remembers him. All the guys wanted to be him and all the girls wanted to sleep with him. Including Atlas, she had fallin head over heels for that boy. She purposely bumped into him in the halls just for him to notice her.. But he never did.

Atlas never thought that in two years time, her sister would befriend Mr.Perfect and she never in a million years thought that he would actually remember her name. Let alone be interested in her.

What will Steve think of the broken girl, could he fix her from herself. Or is she already too far gone.