<human>: Currently a junior in university, so this happened 4 years ago. Background:
I was really awkward in high school when it came to guys. It was a small school so I was either friends with or not friends with the guys in my class, and just generally unconfident.

This one really nice guy sat behind me in one of our classes. He'd always make me laugh and I'd say things that made him laugh but I didn't see it as flirting. (Lord knows I had no idea what flirting meant.)
Prom season rolls around and I get a phone call one night from him asking me to prom. 

Me, having been asked in my lifetime on only one date up to that point (and it didn't go so well), and never having been asked to prom (since it was such a small school, we had prom for all 4 years.) said yes excitedly. It was about the prom, not the guy, but I didn't realize that until I'd already said yes.

At dinner and at prom, I avoided him and didn't really engage in conversation because I was 16 and had no idea what I was supposed to do. He liked me and I didn't like him (like that). At the end of the night, he dropped me off, I said thank you, and that was it.

Looking back on it, I wish I could go back in time and shake 11th grade me and tell her to either get her shit together and tell him beforehand, or put on a happier face and not ruin some dude's prom.

It's one of those things I learned from after the fact but still regret someone had to get hurt in the process. I would love to apologize to him, but there's no non-invasive way to message him with a 'Hey, so 4 years ago I was a bitch to you so let me bring all that unpleasantness up by apologizing now.' (I haven't talked to him since high school.)

Condense the text into a few key points
<bot>: nice guy asked me to prom in high school, I said yes because I wanted to go on a date, was a bitch to him at prom, wish I could go back and change that.