How you handle this will depend upon what, exactly, is the issue. For example, if he is not happy because he feels like he never has any fun or excitement in his life, then you would need to show him that being married to you can be both fun and interesting. Or, if there is an issue that keeps cropping up, it’s probably time to successfully address and eliminate that issue once and for all. It’s very important that he sees you taking swift and decisive action because he needs to believe that the marriage can and will change so that he will remain committed to it.
But that's not your best bet: "Staying in a seriously unhappy marriage can have long-term effects on our mental and emotional health," says Carrie Cole, a couples therapist and Master Certified Gottman Therapist by the Gottman Institute. Research shows that people in bad marriages usually have low self-esteem, struggle with anxiety and depression, and have a higher rate of illness than those who don't. People feel sad and grieve when they decide to let go — but people who divorce do recover emotionally, and Cole says most find new relationships. In fact, "one statistic reported that 85 percent of those who divorce remarry within five years," she says.