What does a dream mean if you dream about your deceased husband and he was happy?

Because you miss him or you want him back maybe....

Unlike the conscious mind, the subconscious mind, which produces dreams, may have difficulty accepting the finality of death. Dreams can be the subconscious mind's way of working its way through that confusion. Dreams can also play an important role in the grieving process, bringing the deceased back temporarily in order to say last Words or simply to feel the loved one's presence. If the dreams occur many years after the grieving process has been finished, it could be that something simply triggered an old memory, such as a familiar place, a snippet of music or even an odor that was associated with the deceased.