grumpy husband

Does anyone else have a grumpy husband? Mine seems to be grumpy every day now. I try to cheer him up but not much happens. I don't know what to do any more. He talks all depressing like he doesn't have anyone or anything here any more. It worries me some times but he also says he would never do anything to him self. Maybe j should just leave him alone, give him space. But then again we usually are really close. Any suggestions?