Dear Welcome to HCM We understand your concerns I went through your details. I suggest you not to worry much. From the given description it is very difficult to diagnose the condition of your friends brother. He could be having social phobia or simple anxiety. Early and correct diagnosis should cure his problem. I don;t think any doctor will visit patient at his home. You may contact some psychologists to assess his condition and give report to a psychiatrist. Then the psychiatrist could prescribe medicines on seeing the report. Psychotherapy techniques should suit your requirement. If you require more of my help in this aspect, Please post a direct question to me in this URL. http://goo.gl/aYW2pR. Make sure that you include every minute details possible. I shall prescribe the needed psychotherapy techniques. Hope this answers your query. Available for further clarifications. Good luck.