Couples form for many reasons. companionship, having kids, mutual interests. What keeps a couple together and happy is feeling valued and respected by each other. Not valuable but valued. No one was born with the right to criticize their partner. Do your own laundry. Pick up your own dry cleaning. Make a meal and clean your own dishes before you attack your partner for not doing something to your standards.
Live like you are single and responsible for meeting the demands of everyday living. Then notice that some one else in your own house likes you. They love you and want to get in bed with you. Ain’t that grand?