Remember how well you know each other. When something's on your mind he'll be able to tell and if you're not talking about it then he might just think you're being grumpy. He's much more likely to respond well if you share the problem, and the same goes for him as well.
Relate's Mo Kurimbokus says: 'Listening, understanding and empathy are all part of communication - not just talking. Speak openly and honestly with each other about your thoughts and feelings. Remember that men in general are not particularly good at expressing their emotions. Help him to develop the language to express his feelings.'