What if I dare not look into other people's eyes when I speak and am often laughed at by others?

My friend, this is a sign of lack of self-confidence. You can bring it up here to show that you still have courage. This may be related to the living environment when you were young. Too strict family education or lack of care may cause this situation. Teach an operable method and tell yourself in the mirror every day. I'm great! Smile, take a deep breath, give yourself a positive psychological hint, look into your eyes in the mirror and believe that you are no worse than others. People's brilliance comes from self-confidence. I hope I can help you.