I want to stare up my classmates skirt all day.
Is there an attraction you feel when you do this?
There is a particular person I've been really irritated with.
If you are irritated with someone you should just make sure you don't have an attraction to them in the first place. Try to look at things differently and think that she could be having issues at home.
I took a lot of pictures of her panties today.
The photos are okay if you intend to destroy them later, once you viewed them. Then in order to not get into trouble I suggest you destroy them safely and never try this act again for your own sake.