Hey man, Crap happens in life. I got alot of rubbish at school as well off of people who thought they were hard, but in my final year i stood up to them and it paid off.
Now im a completely different person to the shy boy i was in school. Im out-going, have loads of friends and im always out at weekends. I never done that at school.
What im trying to say is, Dont dwell on your past dude. Look forward to the future, Cause Whats happened has happened and you cant change it. But you can change the future so its all down to you my friend. You can dwell on the past or you can say "you know, im gonna show them!"