Struggling

My husband and I usually argue. We stop and things are great for probably 3 weeks tops and then it’s back to the same. The cycle never stops. We have been together for almost 6 years. He says I treat him like shit, I always have an attitude, I’m not grateful.... the thing is sometimes I feel like I get treated like shit but I never admit it to him..Any advice? I am so tired of it I don’t know if I have anything else to give.