Hello, this is about your brother. So does my brother. He is withdrawn and doesn't like to associate with people. There is nothing unusual when he is with his family, but he keeps silent when he meets outsiders. At this time, you should spend more time with your brother and often take him out to expand his friends. As for your girlfriend, you don't have to worry too much. He has dated several times before, which proves that he has this heart, but he may not meet the right one, which makes him move.