I am too stubborn and have too much self-esteem. I don't want to be laughed at by them and I don't like what they do. I feel there is nothing to talk about with my classmates. I'm autistic now.

You can't go on like this for long. It will make you narrow-minded and selfish, which is not conducive to physical and mental health. You will also be grumpy and impulsive. You may commit crimes, be depressed and even get seriously ill. So if you don't want the above behavior to happen, then you must change. There are always classmates who don't laugh at you and make friends with them. Plus physical exercise, increase your strengths and make yourself strong, which will change their views on you. Come on!