Now I even skip classes.I atleast skip 2 periods a day.I'm a brat!But my friends dont care.I'm trying to stop doing such bad things,but its sooo hard.I pray,that some how I can become a better person.
Sounds like you need a good old fashion spanking. When I was 14 I got my ass beat all the time for the things you have done. My pants and panties were pulled down and I was spanked with a belt, paddle hand or all three. I only got it a few times but that's all it took. It hurt like hell and it was very very embarrassing.
Being good takes effort. Try changing just one thing at a time. For example, skipping class. Make yourself go to every class at least one day a week. Then work up to 2 days, 3 etc. until you go to every class.
You should also know that your chances of being attacked or abducted when you skip classes is very high. Many sex criminals look for kids who are truant.