Have any worries?
If you have any worries this website might have the answer
What to do
If someone is being nasty to you just think about what they've done and see how bad it is. If it isn't that bad forget about it. If it definitely is bad do something else for a while then go and see them and you will probably be friends again
If someone did something really bad
If you feel like someone did something really bad you should tell someone that you trust.
If you feel sad
If you feel sad about something it's alright to feel sad but tell someone about it and they might be able to help.
If you're frustrated
If you're frustrated read a book or watch TV and see if that helps.