I'm not going to school
Why would you not attend school today?
I just did not want to go to school today for the thrill of it.
Not wanting to go to school is sometimes a feeling everyone gets. If you don't go to school everyday you will get far behind in class and not graduate.
I just don't think it's a big deal. Not going to school is not a crime.
Well, you're right, it's not a crime. But you're only hurting yourself by missing all those lessons you could have learned in school and would make you behind your classmates and you may not perform as good as you want moving forward. Unless it's an emergency, please strive to do your best to stay in school and attend everyday.