Bullying causes depression, depression causes suicide, suicide is killing, killing is murder, bullies are murderers. Don't be a bully. Bullying is mean and a horrible thing to do. If you are getting bullied, just ignore them, they are just jealous.
I'm not saying that bullying isn't wrong, but it is not bullying that causes depression and suicide....it is weakness of character. If people are strong, with a clearly-defined sense of self, it shouldn't matter what people say about them...bullies then become irrelevant
Grow up and get a back bone. Life, and the people that populate it, will not always be kind. You need to learn to deal with it