Why don't I joke with others? When people talk to me, they are serious, and when they talk to others, they are just laughing and having fun. What should I do?

then maybe you are a little serious or reserved. Then change yourself. Learn to laugh first, and laugh at this mirror when no one is around. See how you smile, learn and practice, and don't care too much about other people's comments at first. Look for reasons from yourself. Because laughter is contagious, talk to others with a smile, and others will return you with a smile. I believe it won't take long for you to laugh and others will be willing to communicate with you.