Falling for my enemy

Am I overreacting

My POV
My first class was done, I still had a lot of time until the next one starts. I decided to visit the library for the first time.
It was actually very large, and quiet. Not a lot of students were here. Wait, this is a perfect place to take a quick nap.

I found a place where no one could see me, behind bookshelves, a perfect spot. I put my jacket on the table to use it as a pillow. I lay my head on it, and close my eyes. It was relaxing.

"Y/n?"
I wake up to a familiar voice.
"Please.." I sigh. God, I hope it's not who I think it is...

I look up, and who would have guessed it. It's the same guy I work with.
He wore a black hoodie, his hair was wavy, and kind of messy, covering most of his forehead.

"You go to the same school??" I say confused.

"Unfortunately, yes"

Ugh..

"I haven't seen you around before?" He says.
"I just started a couple of weeks ago"
"Oh..Cool.."
it's getting awkward.

"Since I haven't seen you in any of my classes, I assume your younger than me?" He says, trying to make conversation.
"Um, I'm 20"
He smiles, "I'm 21"

Okay, and? ...

"Anyway, I guess I'll head back to class" he says.

I lay back down, I still have some time left.
"See you at work soon?"
"Yes."
He then walks out. He has been getting nice lately, I don't know if it's because I'm cold towards him. Maybe he feels bad for how he acted that night, or...

Am I overreacting?