I have 3 friends, 2 boys, 1 girl (I'm a girl) and they always are bothering me by calling me names. I hate it but they won't listen!

Well they aren't friends then are they! Tell them once more you don't like it, or call them names!
Maybe start a new friendship group and still be friends but not so much! I've ditched a lot of friends so I'm an expert on that.
If it gets bad tell a teacher or parent! They're probably jealous of you... don't worry it'll be over soon. ;)

It means they are close with you and they like u. I have been in the same situation (im a boy) a girl called me names and I found out she has a crush on me. People call you names to get close to u ,just think can anyone walk up to you and say you names. The eople who call you names are trying to get close to u.just respond to them by ignoring them, if you have a crush or you find one of them atractive respond to that one by touching him, like giving a light push or else IGNORE.

When someone calls you a name, did you ever think about what's really happening? Someone opens their mouth, a sounds comes out...

The sound is just air molecules vibrating across the space, until it reaches your ears.

The sound is translated into a word, by your brain.

Let me ask you a question. How can air molecules transferring a sound cause you any harm, discomfort or agony. It can't of course. It's the idea you have in your head that bothers you. You understand the word, then you give that word some kind of meaning. Then to "think" something is bad with that.

What about what people think? You know people are thinking all the time - you can't hear those words though can you. Still, they are thinking them. My point is - there is always lots of stuff going on in other peoples heads, that has nothing to do with you at all. Even the words that come out of their mouths have nothing to do with you, just because you can hear them. Its only when YOU give meaning to the sounds that they can bug you or not. Don't you understand that words can NOT affect you, unless you let them? Its all about you! Take charge of that, let the sounds that enter your ear, be just that, only sounds.

Baboo Says - A Kids Manual For Life