The first time my husband and I had problems was when our daughter was about the age of yours. It's very easy when you have an infant - especially your first! - to stop paying attention to each other and devote all your attention to your precious baby. Your H may feel, like mine did, that he is competing with baby for your attention and losing. I unfortunately didn't learn that lesson well enough, and we started having similar problems when baby2 was about 10 months old.
It may help you to take more of an interest in him.
