He was frustrated, you could see it in the ugly frown on his face. There was a party going on, and there he was, at an anime event. Dick isn't exactly the guy who likes these things. But you liked it.
You're autistic, and from what he knows, you've been planning this for a year. You have a schedule made a long time ago, he didn't want to ruin it, but the Teen Titans party falls right on the day of your anime event where your favorite writer would be.
He can see the sparkle in your eyes. Several people dressed up, recording videos, waiting in line. He asked to stop at an ice cream shop, you stopped, but it left you agitated. Anguished, because he got out of his schedule.
After the event, when you were on your way back, and you wanted to catch the bus, since you didn't have a car or a boyfriend yet when you made the schedule, it only made you more frustrated.
You were smiling as you looked out the window, holding your signed manga. Meanwhile, he had a frown on his face and arms crossed. He was the one who offered to go, his mistake.
So when you asked him if he was mad at you, he was unintentionally very rude to you. "Being in a tight place with people in costumes for hours is not my ideal kind of night. You should have called Tim, so I would do something I like, and so will you. I do all this for you, it's always for you, but what about me? Sometimes it's hard to be with you. Sometimes I just want to be with someone... Someone normal." He sighed.
As soon as he realized what he said, he shut up and tried to hold her hand "Hey, I didn't... I meant it..."