Your experiences probably stemming from your childhood moulds the structure your marriage concept. When the responses and events does not fit into that framework, problems begin. Awareness of your ideas, concepts, inner rules about marriage or in general would liberate you from the hardships you experience.
So, what beliefs you hold about marriage? Does your partner know these? Are you trying to change him/her to be inline with these? What are those of your thinking/beliefs on loyalty, love, care, support and endless demand??!!