It all happens to us bro. I have had many people make fun of me including my brother and relatives. Yes, iy hurts. It hurts so much. Don't give up bro. We have our life harder than others. I think you should be pretty straight with them that you don't like making fun of. Please don't retaliate as it only makes situation worse. Make a habit of not caring what people say about you. It will be much easier.