How do I resolve my feelings about a fight with my teacher?

In the beginning of the school year, our entire cl (14 students) was having problems with our teacher. We couldn't stand the way he taught and were frustrated with him. One day, he was out and we all talked about what we hate about his teaching. Soon after, he pushed too far and made my friend cry. I was angry so I wrote up some guidelines telling him what problems we have with him. It was supposed to be funny but he didn't take it that way. We had a talk about it and discussed the things in the note. I'm not a bad kid and this is the worst thing I've ever done. I feel guilty about it everyday even though he seems to have forgiven me. He's never brought it up directly but he teases me about sometimes in cl, like an inside joke. Despite his light tone, I still feel horrible about it. Whenever I watch tv and someone is chastised, I feel like it's happening all over again.I don;t know what possessed me to do what I did but I worry about it everyday now. I feel like an immature brat when in all other aspects of my life, I am mature and responsible.I am senior and will graduate soon. I don't want this to haunt me. Our cl has since worked with our teacher to make the cl run more smoothly. What should I do, if anything, to resolve this?