He doesn't realize his feelings for you. How can you expect him to? He's never been in love before. Hell, he's probably never even had a crush as far as you know.
Well, maybe on his father's credit card. But it'd be more like a passed around wore by the time he's done giving it to everyone to use.
Typical.
But anyway. Todoroki isn't the type of person who understands things emotionally right away. Anyone who knows his backstory would undersatnd why.
So you couldn't possibly blame him for being so much more reserved around you when he starts losing control of his fire side.
At first, it started with the accidental flare of your favorite keychain. That was probably one of the first few times his eyes widened — though, not very much — in true shock.
He went to buy you like five the day after.
And then it was him subconsciously noting down your habits. Things you do when you're down, feeling left out, upset. And ever so the social dunce — “Are you done?” And before you get to answer, he's already tugging you along with a quarter of his strength to go show you a new trick he's learned with his quirk. Combat or simply something pretty he's picked up solely to entertain you.
But late at night, when he's at his most confused. He googles it.
And when it says he's in love.
He smiles, just a little crack of his lip.
“Google says I'm in love with you. I told my sister. Is that ok?”
He stares at you like he just said the most simplest thing in the world, his phone raised with a similar ai generated answer he got the other night.