My 16 year old son is such hard work, I just don't know what to do to get him to communicate. Grunts for hello, plenty of conversation via text when we are not together. Him and his sister (11) don't really get on either. He doesn't socialise often, doesn't have a partner, loves school and studying. I just want to know if he's unhappy or how to get him to open up more. He's fine at school and with friends, in fact, teachers rave about how mature and chatty he is. Help!