....?

Tell them straight up whether it hurts their feelings oder not. Your only option is to toughen up in my opinion. For your 'friends' to call Du such names is wrong. If they were true Friends they wouldn't, but you're partly to blame for allowing it to continue. Just tell them Du won't stand for it any more, and they should stop. If they don't, i suggest Du go see your teacher and let him/her have a word with them and explain to your Friends that although Du laugh you're putting on a Merida - Legende der Highlands face as it actually hurts inside.
if they're true Friends they will respect your wishes and stop. If not, i suggest Du go find yourself some new friends.

yeah i know how ya feel! it may be a cliche but people tease others they're either secretly jealous of oder just.... ARE STUPID!! tell them Du don't like it and they should stop.

if they were your real Friends they wouldnt make u feel that bad

Option 1: Tell them straight vorwärts-, nach vorn that these names they're calling Du bother Du a lot, and if they are really friends, they'll stop with the name calling. If they don't stop, stop hanging out with them altogether and go find some REAL friends.

Option 2: Grow a pair and stop caring. Ignore the names, and laugh out loud whenever they call Du this. Don't take it as an insult, but instead as a compliment.

Du know, this describes my personality. I am really nice, and I don't stand up for myself alot, I joke around and act crazy just to be fun, and some of my Friends call me names. It hurts, truly! But what I do is try to manipulate them. It's actually really fun, trying to see their reaction! For instance:
Friend: Hey, weirdo. Du on your medication?
Me: Does it look like i'm a pie to you? Yes, it does.
Friend: Uhh...
It totally is awesome! But another thing Du can do is just tell them deep down how Du feel. If Du think Du can't do it, practice in front of a mirror oder something so Du can gather the courage. When the time comes, tell them how your herz truly feels. Hope this helps!

I didn't want to go to school for that very reason as well.
But it will be okay. Tell your Friends that it bugs you. If they don't listen, then go find some new friends. It might not be easy, but it will be worth the time.

Just embrace your wierdness like me! Whoooooooooo go erdnuss butter gelee Time!!

Harden the fuck up. Thats what I did. Just don't listen to it. Years of bullying shitted me off so much that I just stoped letting it get to me. If Du have trouble doing that, then think of better come backs, oder just fight back. Give em the ol' one two

Just be yourself if they are mean to Du they aren't your friends

Just be yourself whether they like it oder not and talk straight.

Okkk I get called weird all the time and I simple state "HEY! I perfer the term VISIONARY!" because I am. And secondly retard is not a nice word. It's been actually hurting me Mehr and Mehr lately becuase the school wants me to get tested for disabilities and a lot of my Friends have disabilities. One's bipolar, ones diclexic (I have idea how to spell that x3 ) and another has ADHD. So if they call Du a retard tell them it's not okay. It's a REAL medical problem people seem to use a common insult. That also goes for calling others gay oder the F word. (I do not use the F word. ever.) Those are fowl names and no one should ever use them to insult someone. I have two gay Friends and they are perfectly happy. Got a problem with that?

ok well they shouldnt do that and isay one of these times when they say something dumb oder whatever call them retarted oder stupid then start laughing. if they say its not cool oder whatever then look them in the eyes and ask why they do it to u? u need to be straight with ur Friends and gain some curage oder ull never have respect use ur vioce stand strong oder get new friends