My husband is the same way , and I can tell when he is thinking about something that is bothering him and I ask what is wrong? and he just says nothing or dont worry about it and just sits there quiet and doesn't want to talk to me, but then sometimes he will talk to his mother on the phone about things and it frustrates me cause he wont talk to me about it but he will talk to his mother or someone else iin his family, so I guess the best thing is to just leave these guys alone when they are having problems.