Hello From the above given description, you seem to be a sensitive person as others talking about you makes you feel anxious. There is a possibility that your friends know you well and therefore they can understand your feelings and emotions. Try talking to your friends about it so that they can understand you better. You can also try to involve yourself in multiple other activities so that you are occupied and feel better. To improve your memory and marks, you can try meditation, have a sound sleep, improve your diet and use Mnemonic devices which are memory tools to help you remember better.