Every day this week on Newsround we're looking at something that worries you as part of our Why Worry? series.
If I rewind the clock back a few years my big worry was something that lots of you are concerned about too - bullying.
As I know how bad it can be to be on the receiving end of the bullies I was keen to do some investigating myself.
At 7am I boarded a train heading out of London to go to a school that has a special way to deal with a problem that effects children everywhere - bullying.
At one school in North Yorkshire it isn't the teachers or parents battling the bullies - it's the kids!
The school's anti-bullying council is a group of students who personally meet bullies and those being bullied to try to stamp out the problem.
I was bullied
As I was making my way across the country I was thinking about why I was so interested in meeting the council, and my own experiences at the hands of bullies.
Kids can report their problems anonymously
For the first two years of high school I was bullied, felt I had no friends, and certainly didn't believe there was anyone to support me or help me deal with the problem at school.
Although I look back now and realise it wasn't just me who was suffering, and that the bullies were never going to beat me, at the time I did feel alone and very sad.
Eventually I arrived at the school and met the group. They were really keen to show me the special room they use to meet fellow pupils, and the 'Bully Boxes' placed around the school so people can let them know about their problems without others finding out.
I even tagged along as they went to meet younger kids worried about bullying in the future.
The council does a great job supporting people who come to them for help.
Problems sorted out
What was also great about the council is that their schoolmates know they can go and see them anytime, they're not as scary as teachers!
Anti-bullying expert Sue Steel
I think it's a brilliant idea and the council told me loads of kids, both bullies and victims, have met them to get their problems sorted out.
It was great to meet a group so desperate to stamp out bullying - and the great news is it really seemed to be working.
I asked expert Sue Steel from the Anti-Bullying Alliance why people bully other people.
She said: "Sometimes it's because they don't like someone or they may be jealous of them. It could also be because they want to show off in front of their friends.
"Or for some children they maybe just don't like themselves very much, and by bullying other children it makes them feel a bit better."
From meeting the kids and chatting to anti-bullying experts like Sue it's clear that bullying is a problem, and that worrying about it is only natural.
What you mustn't do is let it get you down.
Speak to your friends, your family or your teachers and just remember that even if you are sad because you're being bullied, the bullies are even sadder... Happy people don't bully.
If you're a bully you must know it's wrong, and you should talk to someone about your problem too.
And if this story has inspired you to set up your own anti-bullying group then go for it! The more you do to try and stop it the better!